diff --git a/build/publish.ts b/build/publish.ts
index 29f68ec2f..a69127ac9 100644
--- a/build/publish.ts
+++ b/build/publish.ts
@@ -14,7 +14,9 @@ const {
     CI, GITHUB_EVENT_NAME, GITHUB_REF,
 } = process.env;
 
-if (CI && (GITHUB_REF !== 'refs/heads/master' || GITHUB_EVENT_NAME !== 'push')) {
+const tag = GITHUB_REF === 'refs/heads/master' ? 'latest' : GITHUB_REF === 'refs/heads/develop' ? 'dev' : null;
+
+if (CI && (!tag || GITHUB_EVENT_NAME !== 'push')) {
     console.log('publish skipped.');
     process.exit(0);
 }
@@ -35,7 +37,7 @@ if (CI && (GITHUB_REF !== 'refs/heads/master' || GITHUB_EVENT_NAME !== 'push'))
         try {
             meta = require(`../${name}/package.json`);
             if (!meta.private) {
-                const version = await latest(meta.name);
+                const version = await latest(meta.name, { version: tag });
                 if (gt(meta.version, version)) bumpMap[name] = meta.version;
             }
         } catch (e) {
@@ -48,7 +50,7 @@ if (CI && (GITHUB_REF !== 'refs/heads/master' || GITHUB_EVENT_NAME !== 'push'))
     if (Object.keys(bumpMap).length) {
         for (const name in bumpMap) {
             console.log(`publishing ${name}@${bumpMap[name]} ...`);
-            await spawnAsync(`yarn publish ${name} --new-version ${bumpMap[name]} --access public`);
+            await spawnAsync(`yarn publish ${name} --new-version ${bumpMap[name]}${tag === 'dev' ? '-dev' : ''} --access public --tag ${tag}`);
         }
     }
     console.log('Release created successfully.');
diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 4e12eadb2..69abaf9e1 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.21.0",
+    "version": "2.21.1",
     "bin": "bin/hydrooj.js",
     "main": "dist/loader.js",
     "typings": "dist/loader.d.ts",
diff --git a/packages/hydrooj/src/entry/common.ts b/packages/hydrooj/src/entry/common.ts
index fb088dfe0..855a3c4be 100644
--- a/packages/hydrooj/src/entry/common.ts
+++ b/packages/hydrooj/src/entry/common.ts
@@ -26,7 +26,7 @@ export const builtinModel = [
 export const builtinHandler = [
     'home', 'problem', 'record', 'judge', 'user',
     'contest', 'training', 'discussion', 'manage', 'import.syzoj',
-    'misc', 'homework', 'domain', 'remote',
+    'misc', 'homework', 'domain', 'remote', 'status',
 ];
 
 export const builtinScript = [
diff --git a/packages/hydrooj/src/handler/misc.ts b/packages/hydrooj/src/handler/misc.ts
index af8c138b7..8a7b5217f 100644
--- a/packages/hydrooj/src/handler/misc.ts
+++ b/packages/hydrooj/src/handler/misc.ts
@@ -2,45 +2,10 @@
 import { BadRequestError } from '../error';
 import { PRIV } from '../model/builtin';
 import user from '../model/user';
-import db from '../service/db';
 import {
     Route, Handler, Types, param,
 } from '../service/server';
 
-const coll = db.collection('status');
-
-class StatusHandler extends Handler {
-    async get() {
-        const stats = await coll.find().sort({ type: 1, updateAt: -1 }).toArray();
-        for (const i in stats) {
-            let desc = '';
-            const online = new Date(stats[i].updateAt).getTime() > new Date().getTime() - 300000;
-            if (!online) desc = 'Offline';
-            desc = desc || 'Online';
-            stats[i].isOnline = online;
-            stats[i].status = desc;
-        }
-        const path = [
-            ['Hydro', 'homepage'],
-            ['status', null],
-        ];
-        this.response.body = { stats, path };
-        this.response.template = 'status.html';
-    }
-}
-
-class StatusUpdateHandler extends Handler {
-    async post(args) {
-        this.checkPriv(PRIV.PRIV_JUDGE);
-        args.type = 'judge';
-        return coll.updateOne(
-            { mid: args.mid, type: 'judge' },
-            { $set: args },
-            { upsert: true },
-        );
-    }
-}
-
 class CheckInHandler extends Handler {
     async prepare() {
         const { checkincnt, lastcheckin } = this.user;
@@ -82,8 +47,6 @@ class SwitchLanguageHandler extends Handler {
 }
 
 export async function apply() {
-    Route('status', '/status', StatusHandler);
-    Route('status_update', '/status/update', StatusUpdateHandler);
     Route('check_in', '/checkin', CheckInHandler, PRIV.PRIV_USER_PROFILE);
     Route('switch_language', '/language/:lang', SwitchLanguageHandler);
 }
diff --git a/packages/hydrooj/src/handler/notfound.ts b/packages/hydrooj/src/handler/notfound.ts
index 83255b5be..ea6da1308 100644
--- a/packages/hydrooj/src/handler/notfound.ts
+++ b/packages/hydrooj/src/handler/notfound.ts
@@ -12,14 +12,7 @@ class NotFoundHandler extends Handler {
 }
 
 export async function apply() {
-    Route('notfound', '/:a', NotFoundHandler);
-    Route('notfound', '/:a/:b', NotFoundHandler);
-    Route('notfound', '/:a/:b/:c', NotFoundHandler);
-    Route('notfound', '/:a/:b/:c/:d', NotFoundHandler);
-    Route('notfound', '/:a/:b/:c/:d/:e', NotFoundHandler);
-    Route('notfound', '/:a/:b/:c/:d/:e/:f', NotFoundHandler);
-    Route('notfound', '/:a/:b/:c/:d/:e/:f/:g', NotFoundHandler);
-    Route('notfound', '/:a/:b/:c/:d/:e/:f/:g/:h', NotFoundHandler);
+    Route('notfound', '(/.*)+', NotFoundHandler);
 }
 
 global.Hydro.handler.notfound = apply;
diff --git a/packages/hydrooj/src/handler/status.ts b/packages/hydrooj/src/handler/status.ts
new file mode 100644
index 000000000..55f413296
--- /dev/null
+++ b/packages/hydrooj/src/handler/status.ts
@@ -0,0 +1,81 @@
+import { PRIV } from '../model/builtin';
+import RecordModel from '../model/record';
+import DomainModel from '../model/domain';
+import * as DocumentModel from '../model/document';
+import db from '../service/db';
+import { Route, Handler } from '../service/server';
+import UserModel from '../model/user';
+
+const coll = db.collection('status');
+
+async function getStatus() {
+    const stats = await coll.find().sort({ type: 1, updateAt: -1 }).toArray();
+    for (const stat of stats) {
+        let desc = '';
+        const online = new Date(stat.updateAt).getTime() > new Date().getTime() - 300000;
+        if (!online) desc = 'Offline';
+        desc = desc || 'Online';
+        stat.isOnline = online;
+        stat.status = desc;
+    }
+    return stats;
+}
+
+class StatusHandler extends Handler {
+    async get() {
+        const path = [
+            ['Hydro', 'homepage'],
+            ['status', null],
+        ];
+        const stats = await getStatus();
+        for (const stat of stats) {
+            if (!stat.battery.hasBattery) stat.battery = 'No battery';
+            else stat.battery = `${stat.battery.type} ${stat.battery.model} ${stat.battery.percent}%${stat.battery.isCharging ? ' Charging' : ''}`;
+        }
+        this.response.body = { stats, path };
+        this.response.template = 'status.html';
+    }
+}
+
+class AdminStatusHandler extends Handler {
+    async get() {
+        const record = await RecordModel.stat();
+        const status = await getStatus();
+        const [domainCount, userCount, problemCount, discussionCount, recordCount] = await Promise.all([
+            DomainModel.getMulti().count(),
+            UserModel.getMulti().count(),
+            DocumentModel.coll.find({ docType: DocumentModel.TYPE_PROBLEM }).count(),
+            DocumentModel.coll.find({ docType: DocumentModel.TYPE_DISCUSSION }).count(),
+            RecordModel.coll.find().count(),
+        ]);
+        this.response.body = {
+            record,
+            status,
+            domainCount,
+            userCount,
+            problemCount,
+            discussionCount,
+            recordCount,
+        };
+    }
+}
+
+class StatusUpdateHandler extends Handler {
+    async post(args) {
+        this.checkPriv(PRIV.PRIV_JUDGE);
+        args.type = 'judge';
+        return coll.updateOne(
+            { mid: args.mid, type: 'judge' },
+            { $set: args },
+            { upsert: true },
+        );
+    }
+}
+
+export async function apply() {
+    Route('status', '/status', StatusHandler);
+    Route('status_admin', '/.status', AdminStatusHandler);
+    Route('status_update', '/status/update', StatusUpdateHandler);
+}
+
+global.Hydro.handler.status = apply;
diff --git a/packages/hydrooj/src/interface.ts b/packages/hydrooj/src/interface.ts
index b1d233e2a..fe18dd912 100644
--- a/packages/hydrooj/src/interface.ts
+++ b/packages/hydrooj/src/interface.ts
@@ -565,6 +565,7 @@ declare global {
     namespace NodeJS {
         interface Global {
             Hydro: {
+                version: Record<string, string>,
                 model: Model,
                 handler: Dict<Function>,
                 script: Dict<Script>,
diff --git a/packages/hydrooj/src/lib/sysinfo.ts b/packages/hydrooj/src/lib/sysinfo.ts
index fd8b4e1cf..505f4c25a 100644
--- a/packages/hydrooj/src/lib/sysinfo.ts
+++ b/packages/hydrooj/src/lib/sysinfo.ts
@@ -1,60 +1,54 @@
-import systeminformation from 'systeminformation';
-import { size } from './misc';
+import systeminformation, { Systeminformation } from 'systeminformation';
 
-const cache = {
-    mid: '', cpu: '', osinfo: '', flags: '',
-};
+const cache: any = {};
 
-export async function get() {
-    const [Cpu, Memory, OsInfo, CurrentLoad, CpuFlags, CpuTemp, Battery] = await Promise.all([
+export interface StatusUpdate {
+    memory: Systeminformation.MemData;
+    load: Systeminformation.CurrentLoadData;
+    battery: Systeminformation.BatteryData;
+    CpuTemp: Systeminformation.CpuTemperatureData;
+}
+
+export interface StatusFull extends StatusUpdate {
+    mid: string;
+    cpu: Systeminformation.CpuData;
+    osinfo: Systeminformation.OsData;
+}
+
+export async function get(): Promise<StatusFull> {
+    const [uuid, cpu, memory, osinfo, load, CpuTemp, battery] = await Promise.all([
+        systeminformation.uuid(),
         systeminformation.cpu(),
         systeminformation.mem(),
         systeminformation.osInfo(),
         systeminformation.currentLoad(),
-        systeminformation.cpuFlags(),
         systeminformation.cpuTemperature(),
         systeminformation.battery(),
     ]);
-    const cpu = `${Cpu.manufacturer} ${Cpu.brand}`;
-    const memory = `${size(Memory.active)}/${size(Memory.total)}`;
-    const osinfo = `${OsInfo.distro} ${OsInfo.release} ${OsInfo.codename} ${OsInfo.kernel} ${OsInfo.arch}`;
-    const load = `${CurrentLoad.avgLoad}`;
-    const flags = CpuFlags;
-    let battery;
-    if (!Battery.hasBattery) battery = 'No battery';
-    else battery = `${Battery.type} ${Battery.model} ${Battery.percent}%${Battery.isCharging ? ' Charging' : ''}`;
-    const mid = OsInfo.serial;
+    const mid = uuid.hardware;
     cache.cpu = cpu;
     cache.osinfo = osinfo;
-    cache.flags = flags;
     cache.mid = mid;
     return {
-        mid, cpu, memory, osinfo, load, flags, CpuTemp, battery,
+        mid, cpu, memory, osinfo, load, CpuTemp, battery,
     };
 }
 
-export async function update(): Promise<[string, any, any]> {
-    const [Memory, CurrentLoad, CpuTemp, Battery] = await Promise.all([
+export async function update(): Promise<[string, StatusUpdate, StatusFull]> {
+    const [memory, load, CpuTemp, battery] = await Promise.all([
         systeminformation.mem(),
         systeminformation.currentLoad(),
         systeminformation.cpuTemperature(),
         systeminformation.battery(),
     ]);
-    const {
-        mid, cpu, osinfo, flags,
-    } = cache;
-    const memory = `${size(Memory.active)}/${size(Memory.total)}`;
-    const load = `${CurrentLoad.avgLoad}`;
-    let battery;
-    if (!Battery.hasBattery) battery = 'No battery';
-    else battery = `${Battery.type} ${Battery.model} ${Battery.percent}%${Battery.isCharging ? ' Charging' : ''}`;
+    const { mid, cpu, osinfo } = cache;
     return [
         mid,
         {
             memory, load, battery, CpuTemp,
         },
         {
-            mid, cpu, memory, osinfo, load, flags, battery, CpuTemp,
+            mid, cpu, memory, osinfo, load, battery, CpuTemp,
         },
     ];
 }
diff --git a/packages/hydrooj/src/loader.ts b/packages/hydrooj/src/loader.ts
index bfecff0e1..06aa89d3a 100644
--- a/packages/hydrooj/src/loader.ts
+++ b/packages/hydrooj/src/loader.ts
@@ -10,6 +10,10 @@ if (versionNum < 14) throw new Error('NodeJS >=v14 required');
 
 if (!global.Hydro) {
     global.Hydro = {
+        version: {
+            node: process.version,
+            hydrooj: require('hydrooj/package.json').version,
+        },
         stat: { reqCount: 0 },
         handler: {},
         // @ts-ignore
diff --git a/packages/hydrooj/src/service/monitor.ts b/packages/hydrooj/src/service/monitor.ts
index 9aca31fe5..35d71b332 100644
--- a/packages/hydrooj/src/service/monitor.ts
+++ b/packages/hydrooj/src/service/monitor.ts
@@ -6,6 +6,7 @@ import db from './db';
 import * as bus from './bus';
 import * as sysinfo from '../lib/sysinfo';
 import { Logger } from '../logger';
+import type { StatusUpdate } from '../lib/sysinfo';
 
 const coll = db.collection('status');
 const logger = new Logger('monitor');
@@ -17,15 +18,13 @@ function crypt(str: string) {
     return encrypted;
 }
 
-export async function feedback() {
+export async function feedback(): Promise<[string, StatusUpdate]> {
     const {
         system, domain, document, user, record,
     } = global.Hydro.model;
     const version = require('hydrooj/package.json').version;
-    const [mid, , inf] = await sysinfo.update();
-    const [installid, name, url] = system.getMany([
-        'installid', 'server.name', 'server.url',
-    ]);
+    const [mid, $update, inf] = await sysinfo.update();
+    const [installid, name, url] = system.getMany(['installid', 'server.name', 'server.url']);
     const [domainCount, userCount, problemCount, discussionCount, recordCount] = await Promise.all([
         domain.getMulti().count(),
         user.getMulti().count(),
@@ -47,20 +46,22 @@ export async function feedback() {
         memory: inf.memory,
         osinfo: inf.osinfo,
         cpu: inf.cpu,
-        flags: inf.flags,
     }));
     superagent.post('https://feedback.undefined.moe/')
         .send({ payload })
         .catch(() => {
             logger.warn('Cannot connect to hydro center.');
         });
+    return [mid, $update];
 }
 
 export async function update() {
-    await feedback();
-    const [mid, $set] = await sysinfo.update();
-    $set.updateAt = new Date();
-    $set.reqCount = global.Hydro.stat.reqCount;
+    const [mid, $update] = await feedback();
+    const $set = {
+        ...$update,
+        updateAt: new Date(),
+        reqCount: global.Hydro.stat.reqCount,
+    };
     await bus.serial('monitor/update', 'server', $set);
     await coll.updateOne(
         { mid, type: 'server' },
diff --git a/packages/ui-default/backendlib/template.js b/packages/ui-default/backendlib/template.js
index ecacfcc5e..3ebb8b729 100644
--- a/packages/ui-default/backendlib/template.js
+++ b/packages/ui-default/backendlib/template.js
@@ -163,6 +163,7 @@ env.addGlobal('static_url', (assetName) => {
 });
 // eslint-disable-next-line no-eval
 env.addGlobal('eval', eval);
+env.addGlobal('global', global);
 env.addGlobal('typeof', (o) => typeof o);
 env.addGlobal('datetimeSpan', misc.datetimeSpan);
 env.addGlobal('paginate', misc.paginate);
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 6d6f4ea75..c93653911 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.5.0",
+  "version": "4.5.1",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
diff --git a/packages/ui-default/pages/status.page.styl b/packages/ui-default/pages/status.page.styl
index a57d76afa..e519c4106 100644
--- a/packages/ui-default/pages/status.page.styl
+++ b/packages/ui-default/pages/status.page.styl
@@ -1,15 +1,18 @@
 .page--status
   .col--id
-    width: 70px
+    width: 100px
+
+  .col--os
+    width: 200px
 
   .col--status
-    width: 100px
+    width: 130px
 
   .col--memory
     width: 150px
 
   .col--request
-    width: 100px
+    width: 130px
 
   +mobile()
     .col--os
diff --git a/packages/ui-default/templates/partials/footer.html b/packages/ui-default/templates/partials/footer.html
index cdff942e9..64187626b 100644
--- a/packages/ui-default/templates/partials/footer.html
+++ b/packages/ui-default/templates/partials/footer.html
@@ -66,7 +66,7 @@
           {%- for html in (model.system.get('ui-default.footer_extra_html')|default('')).split('\n') -%}
             <li class="footer__extra-link-item">{{ html|safe }}</li>
           {%- endfor -%}
-          <li class="footer__extra-link-item">Powered by <a href="https://hydro.js.org">Hydro</a></li>
+          <li class="footer__extra-link-item">Powered by <a href="https://hydro.js.org">Hydro v{{ global.Hydro.version.hydrooj }}</a></li>
         </ol>
       </div>
     </div>
diff --git a/packages/ui-default/templates/status.html b/packages/ui-default/templates/status.html
index 02b25f9df..bbfa2cad0 100644
--- a/packages/ui-default/templates/status.html
+++ b/packages/ui-default/templates/status.html
@@ -27,11 +27,11 @@
             <tbody>
               {%- for doc in stats -%}
               <tr>
-                <td class="col--id">{{ doc._id.toHexString()|truncate(6,True,'') }}</td>
+                <td class="col--id">{{ doc._id.toHexString()|truncate(8,True,'') }}</td>
                 <td class="col--status">{% if doc.isOnline %}{{ doc.status }}{% else %}{{ datetimeSpan(doc.updateAt)|safe }}{% endif %}</td>
-                <td class="col--os">{{ doc.osinfo }}</td>
-                <td class="col--cpu" data-tooltip="{{ doc.flags }}">{{ doc.cpu }}</td>
-                <td class="col--memory"{% if doc.stack %} data-tooltip="Stack size: {{ doc.stack }}MB"{% endif %}>{{ doc.memory }}</td>
+                <td class="col--os" data-tooltip="{{ doc.osinfo.kernel }}">{{ doc.osinfo.distro }} {{ doc.osinfo.release }} {{ doc.osinfo.codename }} {{ doc.osinfo.arch }}</td>
+                <td class="col--cpu" data-tooltip="{{ doc.cpu.flags }}">{{ doc.cpu.manufacturer }} {{ doc.cpu.brand }}@{{ doc.cpu.speed }}GHz</td>
+                <td class="col--memory"{% if doc.stack %} data-tooltip="Stack size: {{ doc.stack }}MB"{% endif %}>{{ size(doc.memory.used) }}/{{ size(doc.memory.total) }}</td>
                 <td class="col--request">{{ doc.reqCount }}</td>
               </tr>
               {%- endfor -%}