diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index 8d962fa92..ae36fcb2d 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -11,7 +11,7 @@ import {
     ContestScoreboardHiddenError, FileLimitExceededError, FileUploadError,
     InvalidTokenError, NotAssignedError, PermissionError, ValidationError,
 } from '../error';
-import { Tdoc } from '../interface';
+import { ScoreboardConfig, Tdoc } from '../interface';
 import paginate from '../lib/paginate';
 import { PERM, PRIV, STATUS } from '../model/builtin';
 import * as contest from '../model/contest';
@@ -265,13 +265,21 @@ export class ContestProblemListHandler extends ContestDetailBaseHandler {
 export class ContestScoreboardHandler extends ContestDetailBaseHandler {
     @param('tid', Types.ObjectId)
     @param('ext', Types.Range(['csv', 'html', 'ghost']), true)
-    async get(domainId: string, tid: ObjectId, ext = '') {
+    @param('realtime', Types.Boolean)
+    async get(domainId: string, tid: ObjectId, ext = '', realtime) {
         if (!contest.canShowScoreboard.call(this, this.tdoc, true)) throw new ContestScoreboardHiddenError(tid);
+        if (realtime && !this.user.own(this.tdoc)) {
+            this.checkPerm(PERM.PERM_VIEW_CONTEST_HIDDEN_SCOREBOARD);
+        }
         if (ext) {
             await this.exportScoreboard(domainId, tid, ext);
             return;
         }
-        const [, rows, udict, pdict] = await contest.getScoreboard.call(this, domainId, tid, false);
+        const config: ScoreboardConfig = { isExport: false };
+        if (!realtime && this.tdoc.lockAt && !this.tdoc.unlocked) {
+            config.lockAt = this.tdoc.lockAt;
+        }
+        const [, rows, udict, pdict] = await contest.getScoreboard.call(this, domainId, tid, config);
         this.response.template = 'contest_scoreboard.html';
         // eslint-disable-next-line @typescript-eslint/naming-convention
         const page_name = this.tdoc.rule === 'homework'
@@ -334,7 +342,7 @@ export class ContestScoreboardHandler extends ContestDetailBaseHandler {
             csv: async (rows) => `\uFEFF${rows.map((c) => (c.map((i) => i.value?.toString().replace(/\n/g, ' ')).join(','))).join('\n')}`,
             html: (rows, tdoc) => this.renderHTML('contest_scoreboard_download_html.html', { rows, tdoc }),
         };
-        const [, rows] = await contest.getScoreboard.call(this, domainId, tid, true);
+        const [, rows] = await contest.getScoreboard.call(this, domainId, tid, { isExport: true, lockAt: this.tdoc.lockAt });
         this.binary(await getContent[ext](rows, this.tdoc), `${this.tdoc.title}.${ext}`);
     }
 
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index 5d9b89210..a63aa75ad 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -7,7 +7,7 @@ import { Filter, ObjectId } from 'mongodb';
 import { nanoid } from 'nanoid';
 import { sortFiles, streamToBuffer } from '@hydrooj/utils/lib/utils';
 import {
-    ContestNotAttendedError, ContestNotEndedError, ContestNotFoundError, ContestNotLiveError,
+    BadRequestError, ContestNotAttendedError, ContestNotEndedError, ContestNotFoundError, ContestNotLiveError,
     FileLimitExceededError, HackFailedError, NoProblemError, NotFoundError,
     PermissionError, ProblemAlreadyExistError, ProblemAlreadyUsedByContestError, ProblemConfigError,
     ProblemIsReferencedError, ProblemNotAllowLanguageError, ProblemNotAllowPretestError, ProblemNotFoundError,
@@ -449,6 +449,7 @@ export class ProblemDetailHandler extends ContestDetailBaseHandler {
 
     @param('target', Types.String)
     async postCopy(domainId: string, target: string) {
+        if (this.pdoc.reference) throw new BadRequestError('Cannot copy a referenced problem');
         const t = `,${this.domain.share || ''},`;
         if (t !== ',*,' && !t.includes(`,${target},`)) throw new PermissionError(target);
         const ddoc = await domain.get(target);
@@ -1011,7 +1012,7 @@ export class ProblemPrefixListHandler extends Handler {
 export async function apply(ctx) {
     ctx.Route('problem_main', '/p', ProblemMainHandler, PERM.PERM_VIEW_PROBLEM);
     ctx.Route('problem_random', '/problem/random', ProblemRandomHandler, PERM.PERM_VIEW_PROBLEM);
-    ctx.Route('problem_detail', '/p/:pid', ProblemDetailHandler, PERM.PERM_VIEW_PROBLEM);
+    ctx.Route('problem_detail', '/p/:pid', ProblemDetailHandler);
     ctx.Route('problem_submit', '/p/:pid/submit', ProblemSubmitHandler, PERM.PERM_SUBMIT_PROBLEM);
     ctx.Route('problem_hack', '/p/:pid/hack/:rid', ProblemHackHandler, PERM.PERM_SUBMIT_PROBLEM);
     ctx.Route('problem_edit', '/p/:pid/edit', ProblemEditHandler);
diff --git a/packages/hydrooj/src/interface.ts b/packages/hydrooj/src/interface.ts
index 010e1cbe0..1b8340a90 100644
--- a/packages/hydrooj/src/interface.ts
+++ b/packages/hydrooj/src/interface.ts
@@ -510,6 +510,11 @@ export interface ContestStat extends Record<string, any> {
     unrank?: boolean,
 }
 
+export interface ScoreboardConfig {
+    isExport: boolean;
+    lockAt?: Date;
+}
+
 export interface ContestRule<T = any> {
     _originalRule?: Partial<ContestRule<T>>;
     TEXT: string;
@@ -522,16 +527,16 @@ export interface ContestRule<T = any> {
     showRecord: (tdoc: Tdoc<30>, now: Date) => boolean;
     stat: (this: ContestRule<T>, tdoc: Tdoc<30>, journal: any[]) => ContestStat & T;
     scoreboardHeader: (
-        this: ContestRule<T>, isExport: boolean, _: (s: string) => string,
+        this: ContestRule<T>, config: ScoreboardConfig, _: (s: string) => string,
         tdoc: Tdoc<30>, pdict: ProblemDict,
     ) => Promise<ScoreboardRow>;
     scoreboardRow: (
-        this: ContestRule<T>, isExport: boolean, _: (s: string) => string,
+        this: ContestRule<T>, config: ScoreboardConfig, _: (s: string) => string,
         tdoc: Tdoc<30>, pdict: ProblemDict, udoc: BaseUser, rank: number, tsdoc: ContestStat & T,
         meta?: any,
     ) => Promise<ScoreboardRow>;
     scoreboard: (
-        this: ContestRule<T>, isExport: boolean, _: (s: string) => string,
+        this: ContestRule<T>, config: ScoreboardConfig, _: (s: string) => string,
         tdoc: Tdoc<30>, pdict: ProblemDict, cursor: FindCursor<ContestStat & T>,
     ) => Promise<[board: ScoreboardRow[], udict: BaseUserDict]>;
     ranked: (tdoc: Tdoc<30>, cursor: FindCursor<ContestStat & T>) => Promise<[number, ContestStat & T][]>;
diff --git a/packages/hydrooj/src/model/contest.ts b/packages/hydrooj/src/model/contest.ts
index 5a7119de7..f7218f4a2 100644
--- a/packages/hydrooj/src/model/contest.ts
+++ b/packages/hydrooj/src/model/contest.ts
@@ -7,16 +7,14 @@ import {
 } from '../error';
 import {
     BaseUserDict, ContestRule, ContestRules, ProblemDict,
-    ScoreboardNode, ScoreboardRow, SubtaskResult, Tdoc,
+    ScoreboardConfig, ScoreboardNode, ScoreboardRow, SubtaskResult, Tdoc,
 } from '../interface';
 import ranked from '../lib/rank';
 import * as bus from '../service/bus';
 import type { Handler } from '../service/server';
-import { buildProjection } from '../utils';
 import { PERM, STATUS, STATUS_SHORT_TEXTS } from './builtin';
 import * as document from './document';
 import problem from './problem';
-import RecordModel from './record';
 import user, { User } from './user';
 
 interface AcmJournal {
@@ -59,23 +57,25 @@ const acm = buildContestRule({
     stat(tdoc, journal: AcmJournal[]) {
         const naccept = Counter<number>();
         const npending = Counter<number>();
-        const effective: Record<number, AcmJournal> = {};
+        const display: Record<number, AcmJournal> = {};
         const detail: Record<number, AcmDetail> = {};
         let accept = 0;
         let time = 0;
+        // eslint-disable-next-line @typescript-eslint/no-use-before-define
+        const lockAt = isLocked(tdoc) ? tdoc.lockAt : null;
         for (const j of journal) {
-            if (!this.submitAfterAccept && effective[j.pid]?.status === STATUS.STATUS_ACCEPTED) continue;
-            if (j.status === STATUS.STATUS_WAITING) {
+            if (!this.submitAfterAccept && display[j.pid]?.status === STATUS.STATUS_ACCEPTED) continue;
+            if (lockAt && j.rid.getTimestamp() > lockAt) {
                 npending[j.pid]++;
                 continue;
             }
-            effective[j.pid] = j;
+            display[j.pid] = j;
             if (![STATUS.STATUS_ACCEPTED, STATUS.STATUS_COMPILE_ERROR, STATUS.STATUS_FORMAT_ERROR].includes(j.status)) {
                 naccept[j.pid]++;
             }
         }
-        for (const pid in effective) {
-            const j = effective[pid];
+        for (const pid in display) {
+            const j = display[pid];
             const real = Math.floor((j.rid.getTimestamp().getTime() - tdoc.beginAt.getTime()) / 1000);
             const penalty = 20 * 60 * naccept[j.pid];
             detail[pid] = {
@@ -86,14 +86,16 @@ const acm = buildContestRule({
             accept++;
             time += d.time;
         }
-        return { accept, time, detail };
+        return {
+            accept, time, detail, display,
+        };
     },
-    async scoreboardHeader(isExport, _, tdoc, pdict) {
+    async scoreboardHeader(config, _, tdoc, pdict) {
         const columns: ScoreboardRow = [
             { type: 'rank', value: '#' },
             { type: 'user', value: _('User') },
         ];
-        if (isExport) {
+        if (config.isExport) {
             columns.push({ type: 'email', value: _('Email') });
             columns.push({ type: 'string', value: _('School') });
             columns.push({ type: 'string', value: _('Name') });
@@ -103,7 +105,7 @@ const acm = buildContestRule({
         for (let i = 1; i <= tdoc.pids.length; i++) {
             const pid = tdoc.pids[i - 1];
             pdict[pid].nAccept = pdict[pid].nSubmit = 0;
-            if (isExport) {
+            if (config.isExport) {
                 columns.push(
                     {
                         type: 'string',
@@ -124,13 +126,12 @@ const acm = buildContestRule({
         }
         return columns;
     },
-    async scoreboardRow(isExport, _, tdoc, pdict, udoc, rank, tsdoc, meta) {
-        const tsddict = tsdoc.detail || {};
+    async scoreboardRow(config, _, tdoc, pdict, udoc, rank, tsdoc, meta) {
         const row: ScoreboardRow = [
             { type: 'rank', value: rank.toString() },
             { type: 'user', value: udoc.uname, raw: tsdoc.uid },
         ];
-        if (isExport) {
+        if (config.isExport) {
             row.push({ type: 'email', value: udoc.mail });
             row.push({ type: 'string', value: udoc.school || '' });
             row.push({ type: 'string', value: udoc.displayName || '' });
@@ -143,15 +144,17 @@ const acm = buildContestRule({
         });
         for (const s of tsdoc.journal || []) {
             if (!pdict[s.pid]) continue;
+            if (config.lockAt && s.rid.getTimestamp() > config.lockAt) continue;
             pdict[s.pid].nSubmit++;
             if (s.status === STATUS.STATUS_ACCEPTED) pdict[s.pid].nAccept++;
         }
+        const tsddict = (config.lockAt ? tsdoc.display : tsdoc.detail) || {};
         for (const pid of tdoc.pids) {
             const doc = tsddict[pid] || {} as Partial<AcmDetail>;
             const accept = doc.status === STATUS.STATUS_ACCEPTED;
             const colTime = accept ? formatSeconds(doc.real, false).toString() : '';
             const colPenalty = doc.rid ? Math.ceil(doc.penalty / 60).toString() : '';
-            if (isExport) {
+            if (config.isExport) {
                 row.push(
                     { type: 'string', value: colTime },
                     { type: 'string', value: colPenalty },
@@ -175,7 +178,7 @@ const acm = buildContestRule({
         }
         return row;
     },
-    async scoreboard(isExport, _, tdoc, pdict, cursor) {
+    async scoreboard(config, _, tdoc, pdict, cursor) {
         const rankedTsdocs = await ranked(cursor, (a, b) => a.score === b.score && a.time === b.time);
         const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
         const udict = await user.getListForRender(tdoc.domainId, uids);
@@ -197,12 +200,12 @@ const acm = buildContestRule({
         ]).toArray() as any[];
         for (const t of data) first[t._id] = t.first.getTimestamp().getTime();
 
-        const columns = await this.scoreboardHeader(isExport, _, tdoc, pdict);
+        const columns = await this.scoreboardHeader(config, _, tdoc, pdict);
         const rows: ScoreboardRow[] = [
             columns,
             ...await Promise.all(rankedTsdocs.map(
                 ([rank, tsdoc]) => this.scoreboardRow(
-                    isExport, _, tdoc, pdict, udict[tsdoc.uid], rank, tsdoc, { first },
+                    config, _, tdoc, pdict, udict[tsdoc.uid], rank, tsdoc, { first },
                 ),
             )),
         ];
@@ -219,23 +222,36 @@ const oi = buildContestRule({
     submitAfterAccept: true,
     statusSort: { score: -1 },
     stat(tdoc, journal) {
+        const npending = Counter();
         const detail = {};
+        const display = {};
         let score = 0;
+        // eslint-disable-next-line @typescript-eslint/no-use-before-define
+        const lockAt = isLocked(tdoc) ? tdoc.lockAt : null;
         for (const j of journal.filter((i) => tdoc.pids.includes(i.pid))) {
-            if (!detail[j.pid] || detail[j.pid].score < j.score || this.submitAfterAccept) detail[j.pid] = j;
+            if (!detail[j.pid] || detail[j.pid].score < j.score || this.submitAfterAccept) {
+                detail[j.pid] = j;
+                display[j.pid] ||= {};
+                if (lockAt && j.rid.getTimestamp() > lockAt) {
+                    npending[j.pid]++;
+                    display[j.pid].npending = npending[j.pid];
+                    continue;
+                }
+                display[j.pid] = j;
+            }
         }
-        for (const i in detail) score += detail[i].score;
-        return { score, detail };
+        for (const i in display) score += display[i].score || 0;
+        return { score, detail, display };
     },
     showScoreboard: (tdoc, now) => now > tdoc.endAt,
     showSelfRecord: (tdoc, now) => now > tdoc.endAt,
     showRecord: (tdoc, now) => now > tdoc.endAt,
-    async scoreboardHeader(isExport, _, tdoc, pdict) {
+    async scoreboardHeader(config, _, tdoc, pdict) {
         const columns: ScoreboardNode[] = [
             { type: 'rank', value: '#' },
             { type: 'user', value: _('User') },
         ];
-        if (isExport) {
+        if (config.isExport) {
             columns.push({ type: 'email', value: _('Email') });
             columns.push({ type: 'string', value: _('School') });
             columns.push({ type: 'string', value: _('Name') });
@@ -245,7 +261,7 @@ const oi = buildContestRule({
         for (let i = 1; i <= tdoc.pids.length; i++) {
             const pid = tdoc.pids[i - 1];
             pdict[pid].nAccept = pdict[pid].nSubmit = 0;
-            if (isExport) {
+            if (config.isExport) {
                 columns.push({
                     type: 'string',
                     value: '#{0} {1}'.format(i, pdict[tdoc.pids[i - 1]].title),
@@ -260,13 +276,12 @@ const oi = buildContestRule({
         }
         return columns;
     },
-    async scoreboardRow(isExport, _, tdoc, pdict, udoc, rank, tsdoc, meta) {
-        const tsddict = tsdoc.detail || {};
+    async scoreboardRow(config, _, tdoc, pdict, udoc, rank, tsdoc, meta) {
         const row: ScoreboardNode[] = [
             { type: 'rank', value: rank.toString() },
             { type: 'user', value: udoc.uname, raw: tsdoc.uid },
         ];
-        if (isExport) {
+        if (config.isExport) {
             row.push({ type: 'email', value: udoc.mail });
             row.push({ type: 'string', value: udoc.school || '' });
             row.push({ type: 'string', value: udoc.displayName || '' });
@@ -275,13 +290,15 @@ const oi = buildContestRule({
         row.push({ type: 'total_score', value: tsdoc.score || 0 });
         for (const s of tsdoc.journal || []) {
             if (!pdict[s.pid]) continue;
+            if (config.lockAt && s.rid.getTimestamp() > config.lockAt) continue;
             pdict[s.pid].nSubmit++;
             if (s.status === STATUS.STATUS_ACCEPTED) pdict[s.pid].nAccept++;
         }
+        const tsddict = (config.lockAt ? tsdoc.display : tsdoc.detail) || {};
         for (const pid of tdoc.pids) {
             const index = `${tsdoc.uid}/${tdoc.domainId}/${pid}`;
             // eslint-disable-next-line @typescript-eslint/no-use-before-define
-            const node: ScoreboardNode = (!isExport && isDone(tdoc)
+            const node: ScoreboardNode = (!config.isExport && !config.lockAt && isDone(tdoc)
                 && meta?.psdict?.[index]?.rid
                 && tsddict[pid]?.rid?.toHexString() !== meta?.psdict?.[index]?.rid?.toHexString())
                 ? {
@@ -296,7 +313,8 @@ const oi = buildContestRule({
                     }],
                 } : {
                     type: 'record',
-                    value: tsddict[pid]?.score ?? '-',
+                    value: `${tsddict[pid]?.score ?? '-'}${tsddict[pid]?.npending
+                        ? `<span style="color:orange">+${tsddict[pid]?.npending}</span>` : ''}`,
                     raw: tsddict[pid]?.rid || null,
                 };
             if (tsddict[pid]?.status === STATUS.STATUS_ACCEPTED && tsddict[pid]?.rid.getTimestamp().getTime() === meta?.first?.[pid]) {
@@ -306,7 +324,7 @@ const oi = buildContestRule({
         }
         return row;
     },
-    async scoreboard(isExport, _, tdoc, pdict, cursor) {
+    async scoreboard(config, _, tdoc, pdict, cursor) {
         const rankedTsdocs = await ranked(cursor, (a, b) => a.score === b.score);
         const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
         const udict = await user.getListForRender(tdoc.domainId, uids);
@@ -332,12 +350,12 @@ const oi = buildContestRule({
                 }
             }
         }
-        const columns = await this.scoreboardHeader(isExport, _, tdoc, pdict);
+        const columns = await this.scoreboardHeader(config, _, tdoc, pdict);
         const rows: ScoreboardRow[] = [
             columns,
             ...await Promise.all(rankedTsdocs.map(
                 ([rank, tsdoc]) => this.scoreboardRow(
-                    isExport, _, tdoc, pdict, udict[tsdoc.uid], rank, tsdoc, { psdict, first },
+                    config, _, tdoc, pdict, udict[tsdoc.uid], rank, tsdoc, { psdict, first },
                 ),
             )),
         ];
@@ -381,13 +399,13 @@ const strictioi = buildContestRule({
         for (const i in detail) score += detail[i].score;
         return { score, detail };
     },
-    async scoreboardRow(isExport, _, tdoc, pdict, udoc, rank, tsdoc, meta) {
+    async scoreboardRow(config, _, tdoc, pdict, udoc, rank, tsdoc, meta) {
         const tsddict = tsdoc.detail || {};
         const row: ScoreboardNode[] = [
             { type: 'rank', value: rank.toString() },
             { type: 'user', value: udoc.uname, raw: tsdoc.uid },
         ];
-        if (isExport) {
+        if (config.isExport) {
             row.push({ type: 'email', value: udoc.mail });
             row.push({ type: 'string', value: udoc.school || '' });
             row.push({ type: 'string', value: udoc.displayName || '' });
@@ -447,13 +465,13 @@ const ledo = buildContestRule({
             score, originalScore, detail,
         };
     },
-    async scoreboardRow(isExport, _, tdoc, pdict, udoc, rank, tsdoc, meta) {
+    async scoreboardRow(config, _, tdoc, pdict, udoc, rank, tsdoc, meta) {
         const tsddict = tsdoc.detail || {};
         const row: ScoreboardRow = [
             { type: 'rank', value: rank.toString() },
             { type: 'user', value: udoc.uname, raw: tsdoc.uid },
         ];
-        if (isExport) {
+        if (config.isExport) {
             row.push({ type: 'email', value: udoc.mail });
             row.push({ type: 'string', value: udoc.school || '' });
             row.push({ type: 'string', value: udoc.displayName || '' });
@@ -529,20 +547,20 @@ const homework = buildContestRule({
     showScoreboard: () => true,
     showSelfRecord: () => true,
     showRecord: (tdoc, now) => now > tdoc.endAt,
-    async scoreboardHeader(isExport, _, tdoc, pdict) {
+    async scoreboardHeader(config, _, tdoc, pdict) {
         const columns: ScoreboardNode[] = [
             { type: 'rank', value: _('Rank') },
             { type: 'user', value: _('User') },
             { type: 'total_score', value: _('Score') },
         ];
-        if (isExport) {
+        if (config.isExport) {
             columns.push({ type: 'string', value: _('Original Score') });
         }
         columns.push({ type: 'time', value: _('Total Time') });
         for (let i = 1; i <= tdoc.pids.length; i++) {
             const pid = tdoc.pids[i - 1];
             pdict[pid].nAccept = pdict[pid].nSubmit = 0;
-            if (isExport) {
+            if (config.isExport) {
                 columns.push(
                     {
                         type: 'string',
@@ -567,7 +585,7 @@ const homework = buildContestRule({
         }
         return columns;
     },
-    async scoreboardRow(isExport, _, tdoc, pdict, udoc, rank, tsdoc) {
+    async scoreboardRow(config, _, tdoc, pdict, udoc, rank, tsdoc) {
         const tsddict = tsdoc.detail || {};
         const row: ScoreboardRow = [
             { type: 'rank', value: rank.toString() },
@@ -581,7 +599,7 @@ const homework = buildContestRule({
                 value: tsdoc.penaltyScore || 0,
             },
         ];
-        if (isExport) {
+        if (config.isExport) {
             row.push({ type: 'string', value: tsdoc.score || 0 });
         }
         row.push({ type: 'time', value: formatSeconds(tsdoc.time || 0, false), raw: tsdoc.time });
@@ -596,7 +614,7 @@ const homework = buildContestRule({
             const colOriginalScore = tsddict[pid]?.score ?? '';
             const colTime = tsddict[pid]?.time || '';
             const colTimeStr = colTime ? formatSeconds(colTime, false) : '';
-            if (isExport) {
+            if (config.isExport) {
                 row.push(
                     { type: 'string', value: colScore },
                     { type: 'string', value: colOriginalScore },
@@ -615,15 +633,15 @@ const homework = buildContestRule({
         }
         return row;
     },
-    async scoreboard(isExport, _, tdoc, pdict, cursor) {
+    async scoreboard(config, _, tdoc, pdict, cursor) {
         const rankedTsdocs = await ranked(cursor, (a, b) => a.score === b.score);
         const uids = rankedTsdocs.map(([, tsdoc]) => tsdoc.uid);
         const udict = await user.getListForRender(tdoc.domainId, uids);
-        const columns = await this.scoreboardHeader(isExport, _, tdoc, pdict);
+        const columns = await this.scoreboardHeader(config, _, tdoc, pdict);
         const rows: ScoreboardRow[] = [
             columns,
             ...await Promise.all(rankedTsdocs.map(
-                ([rank, tsdoc]) => this.scoreboardRow(isExport, _, tdoc, pdict, udict[tsdoc.uid], rank, tsdoc),
+                ([rank, tsdoc]) => this.scoreboardRow(config, _, tdoc, pdict, udict[tsdoc.uid], rank, tsdoc),
             )),
         ];
         return [rows, udict];
@@ -695,12 +713,6 @@ async function _updateStatus(
     tdoc: Tdoc<30>, uid: number, rid: ObjectId, pid: number, status: STATUS, score: number,
     subtasks: Record<number, SubtaskResult>,
 ) {
-    // eslint-disable-next-line @typescript-eslint/no-use-before-define
-    if (isLocked(tdoc)) {
-        status = STATUS.STATUS_WAITING;
-        score = 0;
-        subtasks = {};
-    }
     const tsdoc = await document.revPushStatus(tdoc.domainId, document.TYPE_CONTEST, tdoc.docId, uid, 'journal', {
         rid, pid, status, score, subtasks,
     }, 'rid');
@@ -827,19 +839,6 @@ export async function recalcStatus(domainId: string, tid: ObjectId) {
 export async function unlockScoreboard(domainId: string, tid: ObjectId) {
     const tdoc = await document.get(domainId, document.TYPE_CONTEST, tid);
     if (!tdoc.lockAt || tdoc.unlocked) return;
-    const rdocs = await RecordModel.getMulti(domainId, { contest: tid, _id: { $gte: Time.getObjectID(tdoc.lockAt) } })
-        .project(buildProjection(['_id', 'uid', 'pid', 'status', 'score'])).toArray();
-    for (const rdoc of rdocs) {
-        // TODO optimize
-        // eslint-disable-next-line
-        const tsdoc = await document.revPushStatus(domainId, document.TYPE_CONTEST, tid, rdoc.uid, 'journal', {
-            rid: rdoc._id, pid: rdoc.pid, status: rdoc.status, score: rdoc.score,
-        }, 'rid');
-        const journal = _getStatusJournal(tsdoc);
-        const stats = RULES[tdoc.rule].stat(tdoc, journal);
-        // eslint-disable-next-line
-        await document.revSetStatus(domainId, document.TYPE_CONTEST, tid, rdoc.uid, tsdoc.rev, { journal, ...stats });
-    }
     await edit(domainId, tid, { unlocked: true });
 }
 
@@ -868,14 +867,14 @@ export function canShowScoreboard(this: { user: User }, tdoc: Tdoc<30>, allowPer
 }
 
 export async function getScoreboard(
-    this: Handler, domainId: string, tid: ObjectId, isExport = false,
+    this: Handler, domainId: string, tid: ObjectId, config: ScoreboardConfig,
 ): Promise<[Tdoc<30>, ScoreboardRow[], BaseUserDict, ProblemDict]> {
     const tdoc = await get(domainId, tid);
     if (!canShowScoreboard.call(this, tdoc)) throw new ContestScoreboardHiddenError(tid);
     const tsdocsCursor = getMultiStatus(domainId, { docId: tid }).sort(RULES[tdoc.rule].statusSort);
     const pdict = await problem.getList(domainId, tdoc.pids, true, true, problem.PROJECTION_CONTEST_DETAIL);
     const [rows, udict] = await RULES[tdoc.rule].scoreboard(
-        isExport, this.translate.bind(this),
+        config, this.translate.bind(this),
         tdoc, pdict, tsdocsCursor,
     );
     await bus.parallel('contest/scoreboard', tdoc, rows, udict, pdict);
diff --git a/packages/ui-default/locales/zh.yaml b/packages/ui-default/locales/zh.yaml
index 555b1a633..e20576edf 100644
--- a/packages/ui-default/locales/zh.yaml
+++ b/packages/ui-default/locales/zh.yaml
@@ -490,7 +490,7 @@ Live...: 正在进行…
 Loading editor...: 正在加载编辑器...
 Loading file...: 正在加载文件内容...
 Location: 位置
-Lock scoreboard on last N minutes: 在赛事最后N分钟时锁定成绩表
+Freeze scoreboard with N minutes remaining: 在赛事剩余N分钟时封榜
 Login to Attend Contest: 登录后参加比赛
 Login to Claim Homework: 登录后认领作业
 Login to Create a Discussion: 登录后创建讨论
@@ -630,6 +630,7 @@ Please follow the instructions on your device to complete the verification.: 请
 Please select at least one file to perform this operation.: 请选择至少一个文件来执行此操作。
 Please select at least one role to perform this operation.: 请选择至少一个角色来进行操作。
 Please select at least one user to perform this operation.: 请选择至少一个用户来进行操作。
+Please wait until contest host unfreeze the scoreboard.: 请等待比赛主办方解除封榜。
 Preference Settings: 偏好设置
 Preparing Upload...: 准备上传...
 Pretest Data: 自测数据
@@ -750,7 +751,6 @@ Saving file...: 正在保存文件...
 score canceled: 成绩取消
 Score: 分数
 Scoreboard (Hidden): 成绩表 (隐藏)
-Scoreboard locked at {0}: 比赛已于 {0} 封榜。
 Scoreboard: 成绩表
 Scoring method: 评分方式
 Scripts: 脚本
@@ -850,6 +850,7 @@ The invitation code to enter to successfully join the domain. You can only use l
 The invitation code you provided is invalid.: 您提供的邀请码无效。
 The link will be expired at {0}: 链接将于 {0} 过期
 The role to assign when user joining the domain.: 用户加入此域时分配的角色。
+The scoreboard was frozen with {0} minutes remaining at {1} - submissions in the last {0} minutes of the contest are still shown as pending.: 比赛已于 {1} 在剩余 {0} 分钟时封榜 - 比赛最后 {0} 分钟的提交将显示为待定。
 The uploaded file is too long.: 上传的文件太长。
 The user is already a member of the domain.: 该用户已是域的成员。
 The user is too lazy to leave something here...: 该用户太懒，这里啥也没写 (´・ω・｀)
diff --git a/packages/ui-default/templates/contest_edit.html b/packages/ui-default/templates/contest_edit.html
index 2a28b0315..84aa246ad 100644
--- a/packages/ui-default/templates/contest_edit.html
+++ b/packages/ui-default/templates/contest_edit.html
@@ -165,7 +165,7 @@
               name:'lock',
               placeholder:_('(leave blank if none)'),
               value:(((tdoc.endAt - tdoc.lockAt)/60000)|int) if tdoc.lockAt else '',
-              help_text:_('Lock scoreboard on last N minutes'),
+              help_text:_('Freeze scoreboard with N minutes remaining'),
               disabled:true,
               row:false
             }) }}
diff --git a/packages/ui-default/templates/contest_scoreboard.html b/packages/ui-default/templates/contest_scoreboard.html
index ef83a2980..cb24abb74 100644
--- a/packages/ui-default/templates/contest_scoreboard.html
+++ b/packages/ui-default/templates/contest_scoreboard.html
@@ -38,13 +38,13 @@
     {% if model.contest.isLocked(tdoc) %}
       <div class="section__body no-padding">
         <blockquote class="note">
-          {{ _('Scoreboard locked at {0}').format(datetimeSpan(tdoc.lockAt))|safe }}
+          {{ _('The scoreboard was frozen with {0} minutes remaining at {1} - submissions in the last {0} minutes of the contest are still shown as pending.').format((tdoc.endAt - tdoc.lockAt) / 1000 / 60, datetimeSpan(tdoc.lockAt))|safe }}
         </blockquote>
       </div>
     {% elif model.contest.isDone(tdoc) and tdoc.lockAt and not tdoc.unlocked %}
       <div class="section__body no-padding">
         <blockquote class="note">
-          {{ _('Please wait until contest host unlock the scoreboard.') }}
+          {{ _('Please wait until contest host unfreeze the scoreboard.') }}
         </blockquote>
       </div>
     {% endif %}