diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index 2cb4f27c..fcd42bb2 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -162,6 +162,7 @@ export class ContestDetailBaseHandler extends Handler {
                 checker: () => contest.canShowScoreboard.call(this, this.tdoc, true),
             },
             {
+                name: 'problem_detail',
                 displayName: `${String.fromCharCode(65 + this.tdoc.pids.indexOf(pdoc.docId))}. ${pdoc.title}`,
                 args: { query: { tid }, pid: pdoc.docId, prefix: 'contest_detail_problem' },
                 checker: () => 'pdoc' in this,
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index 5bee9f11..8af0406d 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -344,6 +344,7 @@ export class ProblemDetailHandler extends ContestDetailBaseHandler {
             const pdoc = await problem.get(this.pdoc.reference.domainId, this.pdoc.reference.pid);
             if (!ddoc || !pdoc) throw new ProblemNotFoundError(this.pdoc.reference.domainId, this.pdoc.reference.pid);
             this.pdoc.config = pdoc.config;
+            this.pdoc.additional_file = pdoc.additional_file;
         }
         if (typeof this.pdoc.config !== 'string') {
             let baseLangs;
@@ -384,7 +385,8 @@ export class ProblemDetailHandler extends ContestDetailBaseHandler {
             const fields = ['attend', 'startAt'];
             if (this.tdoc.duration) fields.push('endAt');
             if (contest.canShowSelfRecord.call(this, this.tdoc, true)) fields.push('detail');
-            this.response.body.tsdoc = pick(this.tsdoc, fields);
+            this.tsdoc = pick(this.tsdoc, fields);
+            this.response.body.tsdoc = this.tsdoc;
         }
         this.response.template = 'problem_detail.html';
         this.UiContext.extraTitleContent = this.pdoc.title;
@@ -502,6 +504,7 @@ export class ProblemSubmitHandler extends ProblemDetailHandler {
             pdoc: this.pdoc,
             udoc: this.udoc,
             tdoc: this.tdoc,
+            tsdoc: this.tsdoc,
             title: this.pdoc.title,
             page_name: this.tdoc
                 ? this.tdoc.rule === 'homework'
diff --git a/packages/ui-default/templates/discussion_main_or_node.html b/packages/ui-default/templates/discussion_main_or_node.html
index 3fe29180..a37da03a 100644
--- a/packages/ui-default/templates/discussion_main_or_node.html
+++ b/packages/ui-default/templates/discussion_main_or_node.html
@@ -13,6 +13,9 @@
     {% include "partials/problem_sidebar.html" %}
   {% elif vnode.type == model.document.TYPE_CONTEST %}
     {% set tdoc = vnode %}
+    {%- if handler.user.hasPriv(PRIV.PRIV_USER_PROFILE) -%}
+    {% set tsdoc = { attend: tdoc.attend } %}
+    {%- endif -%}
     {% set owner_udoc = udict[vnode.owner] %}
     {% include "partials/contest_sidebar.html" %}
   {% else %}
diff --git a/packages/ui-default/templates/partials/problem_files.html b/packages/ui-default/templates/partials/problem_files.html
index df40c41d..ebc85ff3 100644
--- a/packages/ui-default/templates/partials/problem_files.html
+++ b/packages/ui-default/templates/partials/problem_files.html
@@ -6,7 +6,8 @@
     <blockquote class="note">
       <p>{{ _('This is a copy of another problem.') }}</p>
     </blockquote>
-  {% elif _files.length %}
+  {% endif %}
+  {% if _files.length %}
     <table class="data-table {{ filetype }}-table">
       <colgroup>
         {% if not sidebar %}<col class="col--checkbox">{% endif %}
@@ -53,7 +54,7 @@
         {%- endfor -%}
       </tbody>
     </table>
-  {% else %}
+  {% elif not reference %}
     {{ nothing.render('No {0} at current.', compact=sidebar, args=[_(filetype)]) }}
   {% endif %}
-</div>
\ No newline at end of file
+</div>
diff --git a/packages/ui-default/templates/problem_files.html b/packages/ui-default/templates/problem_files.html
index c6c4b287..2381dd6e 100644
--- a/packages/ui-default/templates/problem_files.html
+++ b/packages/ui-default/templates/problem_files.html
@@ -31,7 +31,7 @@
       <div class="section__header">
         <h1 class="section__title">{{ _('Files') }}</h1>
         <div class="section__tools">
-          {% if handler.user.own(pdoc, perm.PERM_EDIT_PROBLEM_SELF) or handler.user.hasPerm(perm.PERM_EDIT_PROBLEM) %}
+          {% if (handler.user.own(pdoc, perm.PERM_EDIT_PROBLEM_SELF) or handler.user.hasPerm(perm.PERM_EDIT_PROBLEM)) and not reference %}
             <button class="primary rounded button" name="create_file">{{ _('Create File') }}</button>
             <button class="primary rounded button" name="upload_file">{{ _('Upload File') }}</button>
           {% endif %}
@@ -41,7 +41,7 @@
       {% include "partials/problem_files.html" %}
       <div class="section__body">
         <button class="rounded button" name="download_selected_file">{{ _('Download Selected') }}</button>
-        {% if handler.user.own(pdoc, perm.PERM_EDIT_PROBLEM_SELF) or handler.user.hasPerm(perm.PERM_EDIT_PROBLEM) %}
+        {% if (handler.user.own(pdoc, perm.PERM_EDIT_PROBLEM_SELF) or handler.user.hasPerm(perm.PERM_EDIT_PROBLEM)) and not reference %}
           <button class="rounded button" name="remove_selected_file">{{ _('Remove Selected') }}</button>
         {% endif %}
       </div>
diff --git a/packages/ui-default/templates/user_detail.html b/packages/ui-default/templates/user_detail.html
index 2a4f0e8d..f62537ec 100644
--- a/packages/ui-default/templates/user_detail.html
+++ b/packages/ui-default/templates/user_detail.html
@@ -153,7 +153,7 @@
           </div>
           <div class="balancer__body">
             <div class="numbox">
-              <div class="numbox__num medium">{{ udoc.nLiked or 0 }}</div>
+              <div class="numbox__num medium">{{ udoc.nLike or 0 }}</div>
               <div class="numbox__text">{{ _('Solutions Liked') }}</div>
             </div>
           </div>