diff --git a/packages/hydrooj/src/handler/record.ts b/packages/hydrooj/src/handler/record.ts
index 880d8351..2784cff0 100644
--- a/packages/hydrooj/src/handler/record.ts
+++ b/packages/hydrooj/src/handler/record.ts
@@ -85,7 +85,7 @@ class RecordListHandler extends ContestDetailBaseHandler {
         let cursor = record.getMulti(all ? '' : domainId, q).sort('_id', -1);
         if (!full) cursor = cursor.project(buildProjection(record.PROJECTION_LIST));
         const limit = full ? 10 : system.get('pagination.record');
-        const rdocs = invalid
+        let rdocs = invalid
             ? [] as RecordDoc[]
             : await cursor.skip((page - 1) * limit).limit(limit).toArray();
         const canViewProblem = tid || this.user.hasPerm(PERM.PERM_VIEW_PROBLEM);
@@ -97,6 +97,9 @@ class RecordListHandler extends ContestDetailBaseHandler {
                     ? problem.getList(domainId, rdocs.map((rdoc) => rdoc.pid), canViewHiddenProblem, false, problem.PROJECTION_LIST)
                     : Object.fromEntries(uniqBy(rdocs, 'pid').map((rdoc) => [rdoc.pid, { ...problem.default, pid: rdoc.pid }])),
             ]);
+        if (this.tdoc && !this.user.own(this.tdoc) && !this.user.hasPerm(PERM.PERM_EDIT_CONTEST)) {
+            rdocs = rdocs.map((i) => contest.applyProjection(tdoc, i, this.user));
+        }
         this.response.body = {
             page,
             rdocs,
@@ -157,6 +160,9 @@ class RecordDetailHandler extends ContestDetailBaseHandler {
             if (!canView && rdoc.uid !== this.user._id) throw new PermissionError(rid);
             canViewDetail = canView;
             this.args.tid = this.tdoc.docId;
+            if (!this.user.own(this.tdoc) && !this.user.hasPerm(PERM.PERM_EDIT_CONTEST)) {
+                this.rdoc = contest.applyProjection(this.tdoc, this.rdoc, this.user);
+            }
         }
 
         // eslint-disable-next-line prefer-const
@@ -237,6 +243,7 @@ class RecordMainConnectionHandler extends ConnectionHandler {
     status: number;
     pretest = false;
     tdoc: Tdoc<30>;
+    applyProjection = false;
 
     @param('tid', Types.ObjectId, true)
     @param('pid', Types.ProblemId, true)
@@ -253,6 +260,9 @@ class RecordMainConnectionHandler extends ConnectionHandler {
             if (!this.tdoc) throw new ContestNotFoundError(domainId, tid);
             if (pretest || contest.canShowScoreboard.call(this, this.tdoc, true)) this.tid = tid.toHexString();
             else throw new PermissionError(PERM.PERM_VIEW_CONTEST_HIDDEN_SCOREBOARD);
+            if (!this.user.own(this.tdoc) && !this.user.hasPerm(PERM.PERM_EDIT_CONTEST)) {
+                this.applyProjection = true;
+            }
         }
         if (pretest) {
             this.pretest = true;
@@ -312,6 +322,7 @@ class RecordMainConnectionHandler extends ConnectionHandler {
         }
         if (this.pretest) this.send({ rdoc: omit(rdoc, ['code', 'input']) });
         else {
+            if (this.applyProjection) rdoc = contest.applyProjection(tdoc, rdoc, this.user);
             this.send({
                 html: await this.renderHTML('record_main_tr.html', {
                     rdoc, udoc, pdoc, tdoc, all: this.all,
@@ -323,20 +334,25 @@ class RecordMainConnectionHandler extends ConnectionHandler {
 
 class RecordDetailConnectionHandler extends ConnectionHandler {
     pdoc: ProblemDoc;
+    tdoc?: Tdoc<30>;
     rid: string = '';
     disconnectTimeout: NodeJS.Timeout;
     throttleSend: any;
+    applyProjection = false;
 
     @param('rid', Types.ObjectId)
     async prepare(domainId: string, rid: ObjectId) {
         const rdoc = await record.get(domainId, rid);
         if (!rdoc) return;
         if (rdoc.contest && rdoc.input === undefined) {
-            const tdoc = await contest.get(domainId, rdoc.contest);
-            let canView = this.user.own(tdoc);
-            canView ||= contest.canShowRecord.call(this, tdoc);
-            canView ||= this.user._id === rdoc.uid && contest.canShowSelfRecord.call(this, tdoc);
+            this.tdoc = await contest.get(domainId, rdoc.contest);
+            let canView = this.user.own(this.tdoc);
+            canView ||= contest.canShowRecord.call(this, this.tdoc);
+            canView ||= this.user._id === rdoc.uid && contest.canShowSelfRecord.call(this, this.tdoc);
             if (!canView) throw new PermissionError(PERM.PERM_VIEW_CONTEST_HIDDEN_SCOREBOARD);
+            if (!this.user.own(this.tdoc) && !this.user.hasPerm(PERM.PERM_EDIT_CONTEST)) {
+                this.applyProjection = true;
+            }
         }
         const [pdoc, self] = await Promise.all([
             problem.get(rdoc.domainId, rdoc.pid),
@@ -378,6 +394,7 @@ class RecordDetailConnectionHandler extends ConnectionHandler {
             clearTimeout(this.disconnectTimeout);
             this.disconnectTimeout = null;
         }
+        if (this.applyProjection && rdoc.input === undefined) rdoc = contest.applyProjection(this.tdoc, rdoc, this.user);
         // TODO: frontend doesn't support incremental update
         // if ($set) this.send({ $set, $push });
         if (![STATUS.STATUS_WAITING, STATUS.STATUS_JUDGING, STATUS.STATUS_COMPILING, STATUS.STATUS_FETCHED].includes(rdoc.status)) {
diff --git a/packages/hydrooj/src/model/contest.ts b/packages/hydrooj/src/model/contest.ts
index 76083269..f6231309 100644
--- a/packages/hydrooj/src/model/contest.ts
+++ b/packages/hydrooj/src/model/contest.ts
@@ -6,7 +6,7 @@ import {
     ContestScoreboardHiddenError, ValidationError,
 } from '../error';
 import {
-    BaseUserDict, ContestRule, ContestRules, ProblemDict,
+    BaseUserDict, ContestRule, ContestRules, ProblemDict, RecordDoc,
     ScoreboardConfig, ScoreboardNode, ScoreboardRow, SubtaskResult, Tdoc,
 } from '../interface';
 import ranked from '../lib/rank';
@@ -32,6 +32,43 @@ interface AcmDetail extends AcmJournal {
     real: number;
 }
 
+export function isNew(tdoc: Tdoc, days = 1) {
+    const readyAt = tdoc.beginAt.getTime();
+    return Date.now() < readyAt - days * Time.day;
+}
+
+export function isUpcoming(tdoc: Tdoc, days = 7) {
+    const now = Date.now();
+    const readyAt = tdoc.beginAt.getTime();
+    return (now > readyAt - days * Time.day && now < readyAt);
+}
+
+export function isNotStarted(tdoc: Tdoc) {
+    return (new Date()) < tdoc.beginAt;
+}
+
+export function isOngoing(tdoc: Tdoc, tsdoc?: any) {
+    const now = new Date();
+    if (tsdoc && tdoc.duration && tsdoc.startAt <= new Date(Date.now() - Math.floor(tdoc.duration * Time.hour))) return false;
+    return (tdoc.beginAt <= now && now < tdoc.endAt);
+}
+
+export function isDone(tdoc: Tdoc, tsdoc?: any) {
+    if (tdoc.endAt <= new Date()) return true;
+    if (tsdoc && tdoc.duration && tsdoc.startAt <= new Date(Date.now() - Math.floor(tdoc.duration * Time.hour))) return true;
+    return false;
+}
+
+export function isLocked(tdoc: Tdoc, time = new Date()) {
+    if (!tdoc.lockAt) return false;
+    return tdoc.lockAt < time && !tdoc.unlocked;
+}
+
+export function isExtended(tdoc: Tdoc) {
+    const now = new Date().getTime();
+    return tdoc.penaltySince.getTime() <= now && now < tdoc.endAt.getTime();
+}
+
 function buildContestRule<T>(def: ContestRule<T>): ContestRule<T>;
 function buildContestRule<T>(def: Partial<ContestRule<T>>, baseRule: ContestRule<T>): ContestRule<T>;
 function buildContestRule<T>(def: Partial<ContestRule<T>>, baseRule: ContestRule<T> = {} as any) {
@@ -217,6 +254,16 @@ const acm = buildContestRule({
     async ranked(tdoc, cursor) {
         return await ranked(cursor, (a, b) => a.accept === b.accept && a.time === b.time);
     },
+    applyProjection(tdoc, rdoc) {
+        if (isDone(tdoc)) return rdoc;
+        delete rdoc.time;
+        delete rdoc.memory;
+        rdoc.testCases = [];
+        rdoc.judgeTexts = [];
+        delete rdoc.subtasks;
+        delete rdoc.score;
+        return rdoc;
+    },
 });
 
 const oi = buildContestRule({
@@ -367,6 +414,18 @@ const oi = buildContestRule({
     async ranked(tdoc, cursor) {
         return await ranked(cursor, (a, b) => a.score === b.score);
     },
+    applyProjection(tdoc, rdoc) {
+        if (isDone(tdoc)) return rdoc;
+        delete rdoc.status;
+        rdoc.compilerTexts = [];
+        rdoc.judgeTexts = [];
+        delete rdoc.memory;
+        delete rdoc.time;
+        delete rdoc.score;
+        rdoc.testCases = [];
+        delete rdoc.subtasks;
+        return rdoc;
+    },
 });
 
 const ioi = buildContestRule({
@@ -376,6 +435,9 @@ const ioi = buildContestRule({
     showRecord: (tdoc, now) => now > tdoc.endAt && !isLocked(tdoc),
     showSelfRecord: () => true,
     showScoreboard: (tdoc, now) => now > tdoc.beginAt,
+    applyProjection(_, rdoc) {
+        return rdoc;
+    },
 }, oi);
 
 const strictioi = buildContestRule({
@@ -501,6 +563,9 @@ const ledo = buildContestRule({
         }
         return row;
     },
+    applyProjection(_, rdoc) {
+        return rdoc;
+    },
 }, oi);
 
 const homework = buildContestRule({
@@ -650,6 +715,9 @@ const homework = buildContestRule({
     async ranked(tdoc, cursor) {
         return await ranked(cursor, (a, b) => a.score === b.score);
     },
+    applyProjection(_, rdoc) {
+        return rdoc;
+    },
 });
 
 export const RULES: ContestRules = {
@@ -780,44 +848,6 @@ export function getMultiStatus(domainId: string, query: any) {
     return document.getMultiStatus(domainId, document.TYPE_CONTEST, query);
 }
 
-export function isNew(tdoc: Tdoc, days = 1) {
-    const now = new Date().getTime();
-    const readyAt = tdoc.beginAt.getTime();
-    return (now < readyAt - days * Time.day);
-}
-
-export function isUpcoming(tdoc: Tdoc, days = 7) {
-    const now = Date.now();
-    const readyAt = tdoc.beginAt.getTime();
-    return (now > readyAt - days * Time.day && now < readyAt);
-}
-
-export function isNotStarted(tdoc: Tdoc) {
-    return (new Date()) < tdoc.beginAt;
-}
-
-export function isOngoing(tdoc: Tdoc, tsdoc?: any) {
-    const now = new Date();
-    if (tsdoc && tdoc.duration && tsdoc.startAt <= new Date(Date.now() - Math.floor(tdoc.duration * Time.hour))) return false;
-    return (tdoc.beginAt <= now && now < tdoc.endAt);
-}
-
-export function isDone(tdoc: Tdoc, tsdoc?: any) {
-    if (tdoc.endAt <= new Date()) return true;
-    if (tsdoc && tdoc.duration && tsdoc.startAt <= new Date(Date.now() - Math.floor(tdoc.duration * Time.hour))) return true;
-    return false;
-}
-
-export function isLocked(tdoc: Tdoc, time = new Date()) {
-    if (!tdoc.lockAt) return false;
-    return tdoc.lockAt < time && !tdoc.unlocked;
-}
-
-export function isExtended(tdoc: Tdoc) {
-    const now = new Date().getTime();
-    return tdoc.penaltySince.getTime() <= now && now < tdoc.endAt.getTime();
-}
-
 export function setStatus(domainId: string, tid: ObjectId, uid: number, $set: any) {
     return document.setStatus(domainId, document.TYPE_CONTEST, tid, uid, $set);
 }
@@ -942,6 +972,11 @@ export function getMultiClarification(domainId: string, tid: ObjectId, owner = 0
     ).sort('_id', -1).toArray();
 }
 
+export function applyProjection(tdoc: Tdoc<30>, rdoc: RecordDoc, udoc: User) {
+    if (!RULES[tdoc.rule]) return rdoc;
+    return RULES[tdoc.rule].applyProjection(tdoc, rdoc, udoc);
+}
+
 export const statusText = (tdoc: Tdoc, tsdoc?: any) => (
     isNew(tdoc)
         ? 'New'
@@ -990,5 +1025,6 @@ global.Hydro.model.contest = {
     isDone,
     isLocked,
     isExtended,
+    applyProjection,
     statusText,
 };
diff --git a/packages/ui-default/components/scratchpad/ScratchpadRecordsRowContainer.jsx b/packages/ui-default/components/scratchpad/ScratchpadRecordsRowContainer.jsx
index 425f969d..f44aab1c 100644
--- a/packages/ui-default/components/scratchpad/ScratchpadRecordsRowContainer.jsx
+++ b/packages/ui-default/components/scratchpad/ScratchpadRecordsRowContainer.jsx
@@ -9,7 +9,7 @@ import {
   emulateAnchorClick, i18n, mongoId, substitute,
 } from 'vj/utils';
 
-const shouldShowDetail = (data) => recordEnum.STATUS_SCRATCHPAD_SHOW_DETAIL_FLAGS[data.status];
+const shouldShowDetail = (data) => recordEnum.STATUS_SCRATCHPAD_SHOW_DETAIL_FLAGS[data.status] && data.testCases?.length;
 
 const getRecordDetail = (data) => {
   if (!shouldShowDetail(data)) {
diff --git a/packages/ui-default/templates/record_detail_summary.html b/packages/ui-default/templates/record_detail_summary.html
index 4944d454..699f7651 100644
--- a/packages/ui-default/templates/record_detail_summary.html
+++ b/packages/ui-default/templates/record_detail_summary.html
@@ -1,8 +1,14 @@
 <dl class="large horizontal" id="summary">
-  <dt>{{ _('Score') }}</dt>
-  <dd>{{ rdoc['score'] }}</dd>
-  <dt>{{ _('Total Time') }}</dt>
-  <dd>{% if rdoc['status'] == STATUS.STATUS_TIME_LIMIT_EXCEEDED or rdoc['status'] == STATUS.STATUS_MEMORY_LIMIT_EXCEEDED or rdoc['status'] == STATUS.STATUS_OUTPUT_LIMIT_EXCEEDED %}&ge;{% endif %}{{ rdoc.time|round|int }}ms</dd>
-  <dt>{{ _('Peak Memory') }}</dt>
-  <dd>{% if rdoc['status'] == STATUS.STATUS_TIME_LIMIT_EXCEEDED or rdoc['status'] == STATUS.STATUS_MEMORY_LIMIT_EXCEEDED or rdoc['status'] == STATUS.STATUS_OUTPUT_LIMIT_EXCEEDED %}&ge;{% endif %}{{ size(rdoc.memory, 1024) }}</dd>
+  {% if typeof(rdoc['score']) == 'number' %}
+    <dt>{{ _('Score') }}</dt>
+    <dd>{{ rdoc['score'] }}</dd>
+  {% endif %}
+  {% if rdoc['time'] %}
+    <dt>{{ _('Total Time') }}</dt>
+    <dd>{% if rdoc['status'] == STATUS.STATUS_TIME_LIMIT_EXCEEDED or rdoc['status'] == STATUS.STATUS_MEMORY_LIMIT_EXCEEDED or rdoc['status'] == STATUS.STATUS_OUTPUT_LIMIT_EXCEEDED %}&ge;{% endif %}{{ rdoc.time|round|int }}ms</dd>
+  {% endif %}
+  {% if rdoc['memory'] %}
+    <dt>{{ _('Peak Memory') }}</dt>
+    <dd>{% if rdoc['status'] == STATUS.STATUS_TIME_LIMIT_EXCEEDED or rdoc['status'] == STATUS.STATUS_MEMORY_LIMIT_EXCEEDED or rdoc['status'] == STATUS.STATUS_OUTPUT_LIMIT_EXCEEDED %}&ge;{% endif %}{{ size(rdoc.memory, 1024) }}</dd>
+  {% endif %}
 </dl>