diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index aaff7eb74..7e7f1b613 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -92,10 +92,6 @@ export class ContestDetailBaseHandler extends Handler {
 
     @param('tid', Types.ObjectID, true)
     async __prepare(domainId: string, tid: ObjectID) {
-        if (this.session.tid && this.session.tid !== tid) {
-            // TODO: you are already in a contest
-            throw new ForbiddenError();
-        }
         if (!tid) return; // ProblemDetailHandler also extends from ContestDetailBaseHandler
         [this.tdoc, this.tsdoc] = await Promise.all([
             contest.get(domainId, tid),
@@ -122,7 +118,7 @@ export class ContestDetailBaseHandler extends Handler {
                 name: 'contest_main',
                 args: {},
                 displayName: 'Back to contest list',
-                checker: () => !(this.tdoc.access & contest.AccessControl.LOCK_OTHER),
+                checker: () => true,
             },
             {
                 name: 'contest_detail',
@@ -161,10 +157,6 @@ export class ContestDetailHandler extends Handler {
             contest.getStatus(domainId, tid, this.user._id),
         ]);
         if (contest.RULES[this.tdoc.rule].hidden) throw new ContestNotFoundError(domainId, tid);
-        if (this.session.tid && this.session.tid !== tid) {
-            // TODO: you are already in a contest
-            throw new ForbiddenError();
-        }
         if (this.tdoc.assign?.length && !this.user.own(this.tdoc)) {
             const groups = await user.listGroup(domainId, this.user._id);
             if (!Set.intersection(this.tdoc.assign, groups.map((i) => i.name)).size) {
@@ -193,7 +185,7 @@ export class ContestDetailHandler extends Handler {
                 name: 'contest_main',
                 args: {},
                 displayName: 'Back to contest list',
-                checker: () => !(this.tdoc.access & contest.AccessControl.LOCK_OTHER),
+                checker: () => true,
             },
             {
                 name: 'contest_detail',
@@ -225,9 +217,11 @@ export class ContestDetailHandler extends Handler {
     async postAttend(domainId: string, tid: ObjectID, code = '') {
         if (contest.isDone(this.tdoc)) throw new ContestNotLiveError(tid);
         if (this.tdoc._code && code !== this.tdoc._code && !this.tdoc.uninvite) throw new InvalidTokenError('Contest Invitation', code);
-        await contest.attend(domainId, tid, this.user._id);
-        if (this.tdoc.unrankUser.includes(this.user._id)
-            || (this.tdoc._code && code !== this.tdoc._code && this.tdoc.uninvite)) contest.setStatus(domainId, tid, this.user._id, { unrank: true });
+        await contest.attend(
+            domainId, tid, this.user._id,
+            (this.tdoc._code && code !== this.tdoc._code && this.tdoc.uninvite)
+                ? { unrank: true } : {},
+        );
         this.back();
     }
 }
diff --git a/packages/hydrooj/src/handler/training.ts b/packages/hydrooj/src/handler/training.ts
index 7339348b7..1a1a2f61e 100644
--- a/packages/hydrooj/src/handler/training.ts
+++ b/packages/hydrooj/src/handler/training.ts
@@ -258,14 +258,14 @@ export class TrainingFilesHandler extends Handler {
     @param('tid', Types.ObjectID)
     @post('filename', Types.Name, true)
     async postUploadFile(domainId: string, tid: ObjectID, filename: string) {
-        if ((this.tdoc.files?.length || 0) >= system.get('limit.training_files')) {
+        if ((this.tdoc.files?.length || 0) >= system.get('limit.contest_files')) {
             throw new FileLimitExceededError('count');
         }
         const file = this.request.files?.file;
         if (!file) throw new ValidationError('file');
         const f = statSync(file.filepath);
         const size = Math.sum((this.tdoc.files || []).map((i) => i.size)) + f.size;
-        if (size >= system.get('limit.training_files_size')) {
+        if (size >= system.get('limit.contest_files_size')) {
             throw new FileLimitExceededError('size');
         }
         if (!filename) filename = file.originalFilename || String.random(16);
diff --git a/packages/hydrooj/src/interface.ts b/packages/hydrooj/src/interface.ts
index d6e12bdad..e9d9c6ca5 100644
--- a/packages/hydrooj/src/interface.ts
+++ b/packages/hydrooj/src/interface.ts
@@ -366,9 +366,7 @@ export interface Tdoc<docType = document['TYPE_CONTEST'] | document['TYPE_TRAINI
     // For contest
     lockAt?: Date;
     unlocked?: boolean;
-    access?: number;
     autoHide?: boolean;
-    unrankUser?: number[];
     uninvite?: boolean;
 
     /**
diff --git a/packages/hydrooj/src/lib/rank.ts b/packages/hydrooj/src/lib/rank.ts
index c2b3d0a60..841255d03 100644
--- a/packages/hydrooj/src/lib/rank.ts
+++ b/packages/hydrooj/src/lib/rank.ts
@@ -1,6 +1,6 @@
 import { Cursor } from 'mongodb';
 
-type ranked = <T>(cursor: Cursor<T>, equ: ((a: T, b: T) => boolean)) => Promise<[number, T][]>;
+type ranked = <T extends Record<string, any>>(cursor: Cursor<T>, equ: ((a: T, b: T) => boolean)) => Promise<[number, T][]>;
 
 const ranked: ranked = async (cursor, equ) => {
     let last = null;
diff --git a/packages/hydrooj/src/model/contest.ts b/packages/hydrooj/src/model/contest.ts
index e2a347d1d..b4f5b75c7 100644
--- a/packages/hydrooj/src/model/contest.ts
+++ b/packages/hydrooj/src/model/contest.ts
@@ -127,7 +127,7 @@ const acm = buildContestRule({
     async scoreboardRow(isExport, _, tdoc, pdict, udoc, rank, tsdoc, meta) {
         const tsddict = tsdoc.detail || {};
         const row: ScoreboardRow = [
-            { type: 'rank', value: rank ? rank.toString() : '*', raw: rank },
+            { type: 'rank', value: rank.toString() },
             { type: 'user', value: udoc.uname, raw: tsdoc.uid },
         ];
         if (isExport) {
@@ -263,7 +263,7 @@ const oi = buildContestRule({
     async scoreboardRow(isExport, _, tdoc, pdict, udoc, rank, tsdoc, meta) {
         const tsddict = tsdoc.detail || {};
         const row: ScoreboardNode[] = [
-            { type: 'rank', value: rank ? rank.toString() : '*', raw: rank },
+            { type: 'rank', value: rank.toString() },
             { type: 'user', value: udoc.uname, raw: tsdoc.uid },
         ];
         if (isExport) {
@@ -510,13 +510,6 @@ export const RULES: ContestRules = {
     acm, oi, homework, ioi,
 };
 
-export enum AccessControl {
-    FREE,
-    LOCK_OTHER = 2,
-    UNIQUE_LOGIN = 4,
-    CLIENT_REQUIRED = 8,
-}
-
 function _getStatusJournal(tsdoc) {
     return tsdoc.journal.sort((a, b) => (a.rid.generationTime - b.rid.generationTime));
 }
@@ -600,9 +593,9 @@ export async function getListStatus(domainId: string, uid: number, tids: ObjectI
     return r;
 }
 
-export async function attend(domainId: string, tid: ObjectID, uid: number) {
+export async function attend(domainId: string, tid: ObjectID, uid: number, payload: any = {}) {
     try {
-        await document.cappedIncStatus(domainId, document.TYPE_CONTEST, tid, uid, 'attend', 1, 0, 1);
+        await document.cappedIncStatus(domainId, document.TYPE_CONTEST, tid, uid, 'attend', 1, 0, 1, payload);
     } catch (e) {
         throw new ContestAlreadyAttendedError(tid, uid);
     }
@@ -753,7 +746,6 @@ export const statusText = (tdoc: Tdoc, tsdoc?: any) => (
 
 global.Hydro.model.contest = {
     RULES,
-    AccessControl,
     add,
     getListStatus,
     getMultiStatus,
diff --git a/packages/hydrooj/src/model/document.ts b/packages/hydrooj/src/model/document.ts
index 2a764a033..3388e2c8a 100644
--- a/packages/hydrooj/src/model/document.ts
+++ b/packages/hydrooj/src/model/document.ts
@@ -350,12 +350,15 @@ export async function setStatusIfNotCondition<T extends keyof DocStatusType>(
 export async function cappedIncStatus<T extends keyof DocStatusType>(
     domainId: string, docType: T, docId: DocStatusType[T]['docId'], uid: number,
     key: NumberKeys<DocStatusType[T]>, value: number, minValue = -1, maxValue = 1,
+    setPayload: Partial<DocStatusType[T]> = {},
 ): Promise<DocStatusType[T]> {
     assert(value !== 0);
     const $not = value > 0 ? { $gte: maxValue } : { $lte: minValue };
+    const operation = { $inc: { [key]: value } } as UpdateQuery<DocStatusType[T]>;
+    if (Object.keys(setPayload).length) operation.$set = setPayload;
     const res = await collStatus.findOneAndUpdate(
         { domainId, docType, docId, uid, [key]: { $not } },
-        { $inc: { [key]: value } },
+        operation,
         { upsert: true, returnDocument: 'after' },
     );
     return res.value;
diff --git a/packages/hydrooj/src/model/setting.ts b/packages/hydrooj/src/model/setting.ts
index 054f47ecd..ea60bcef9 100644
--- a/packages/hydrooj/src/model/setting.ts
+++ b/packages/hydrooj/src/model/setting.ts
@@ -213,10 +213,8 @@ SystemSetting(
     Setting('setting_limits', 'limit.problem_files_max_size', 256 * 1024 * 1024, 'number', 'limit.problem_files_max_size', 'Max files size per problem'),
     Setting('setting_limits', 'limit.user_files', 100, 'number', 'limit.user_files', 'Max files for user'),
     Setting('setting_limits', 'limit.user_files_size', 128 * 1024 * 1024, 'number', 'limit.user_files_size', 'Max total file size for user'),
-    Setting('setting_limits', 'limit.contest_files', 100, 'number', 'limit.contest_files', 'Max files for contest'),
-    Setting('setting_limits', 'limit.contest_files_size', 128 * 1024 * 1024, 'number', 'limit.contest_files_size', 'Max total file size for contest'),
-    Setting('setting_limits', 'limit.training_files', 100, 'number', 'limit.training_files', 'Max files for training'),
-    Setting('setting_limits', 'limit.training_files_size', 128 * 1024 * 1024, 'number', 'limit.training_files_size', 'Max total file size for training'),
+    Setting('setting_limits', 'limit.contest_files', 100, 'number', 'limit.contest_files', 'Max files for contest or training'),
+    Setting('setting_limits', 'limit.contest_files_size', 128 * 1024 * 1024, 'number', 'limit.contest_files_size', 'Max total file size for contest or training'),
     Setting('setting_limits', 'limit.submission', 60, 'number', 'limit.submission', 'Max submission count per minute'),
     Setting('setting_limits', 'limit.submission_user', 15, 'number', 'limit.submission_user', 'Max submission count per user per minute'),
     Setting('setting_limits', 'limit.pretest', 60, 'number', 'limit.pretest', 'Max pretest count per minute'),
diff --git a/packages/ui-default/pages/contest_scoreboard.page.ts b/packages/ui-default/pages/contest_scoreboard.page.ts
index d88193a39..5c84228c3 100644
--- a/packages/ui-default/pages/contest_scoreboard.page.ts
+++ b/packages/ui-default/pages/contest_scoreboard.page.ts
@@ -3,35 +3,23 @@ import { NamedPage } from 'vj/misc/Page';
 
 const page = new NamedPage('contest_scoreboard', () => {
   const { tdoc } = UiContext;
-  let starData = JSON.parse(localStorage.getItem('Hydro.starData')) || {};
-  Object.keys(starData).forEach((key) => {
-    if (starData[key].expire < Date.now()) delete starData[key];
-  });
-  if (!starData[tdoc.docId]) {
-    starData[tdoc.docId] = {
-      expire: tdoc.endAt + 1000 * 60 * 60 * 24 * 7,
-      starUids: [],
-    };
-  } else {
-    starData[tdoc.docId].starUids.forEach((uid) => {
-      console.log(uid);
-      $(`.star.user--${uid}`).addClass('activated');
-    });
-  }
-  console.log(starData[tdoc.docId].starUids);
-  localStorage.setItem('Hydro.starData', JSON.stringify(starData));
+  const key = `scoreboard-star/${tdoc.domainId}/${tdoc.docId}`;
+  const read = () => JSON.parse(localStorage.getItem(key) || '[]');
+  const write = (data) => localStorage.setItem(key, JSON.stringify(data));
+
+  read().forEach((uid) => $(`.star.user--${uid}`).addClass('activated'));
   $('.star').on('click', (e) => {
-    starData = JSON.parse(localStorage.getItem('Hydro.starData'));
+    const star = read();
     const $target = $(e.currentTarget);
     const uid = $target.data('uid');
-    if (starData[tdoc.docId].starUids.includes(uid)) {
+    if (star.includes(uid)) {
       $target.removeClass('activated');
-      starData[tdoc.docId].starUids.splice(starData[tdoc.docId].starUids.indexOf(uid), 1);
+      star.splice(star.indexOf(uid), 1);
     } else {
       $target.addClass('activated');
-      starData[tdoc.docId].starUids.push(uid);
+      star.push(uid);
     }
-    localStorage.setItem('Hydro.starData', JSON.stringify(starData));
+    write(star);
   });
 
   $('.select.filter').on('change', (e) => {
@@ -40,9 +28,7 @@ const page = new NamedPage('contest_scoreboard', () => {
       $('.data-table tbody tr').show();
     } else if (val === 'star') {
       $('.data-table tbody tr').hide();
-      starData[tdoc.docId].starUids.forEach((uid) => {
-        $(`.star.user--${uid}`).closest('tr').show();
-      });
+      read().forEach((uid) => $(`.star.user--${uid}`).closest('tr').show());
     } else {
       $('.data-table tbody tr').hide();
       $('.rank--unrank').closest('tr').show();
diff --git a/packages/ui-default/templates/contest_scoreboard.html b/packages/ui-default/templates/contest_scoreboard.html
index 6d2a03ee3..214767403 100644
--- a/packages/ui-default/templates/contest_scoreboard.html
+++ b/packages/ui-default/templates/contest_scoreboard.html
@@ -35,7 +35,6 @@
         </select>
       </div>
     </div>
-    <h1 style="text-align:center" class="section__title">{{ tdoc.title }}</h1>
     {% if model.contest.isLocked(tdoc) %}
       <div class="section__body no-padding">
         <blockquote class="note">
@@ -78,7 +77,7 @@
             {%- for column in row -%}
               <td class="col--{{ rows[0][loop.index0]['type'] }}"{% if column.style %} style="{{ column.style }}"{% endif %}>
               {%- if column.type == 'rank' -%}
-                <span class="{{ 'rank--normal' if column.raw else 'rank--unrank' }}">{{ column.value|string|nl2br|safe }}</span>
+                <span class="{{ 'rank--unrank' if column.value == '0' else 'rank--normal' }}">{{ '*' if column.value == '0' else column.value|string|nl2br|safe }}</span>
               {%- elif column.type == 'user' -%}
                 {%- set canView = canViewAll or handler.user._id == column.raw -%}
                 <button class="star user--{{ column.raw }}" data-uid="{{ column.raw }}">