diff --git a/src/Flows.js b/src/Flows.js
index 43cd9b4..9024564 100644
--- a/src/Flows.js
+++ b/src/Flows.js
@@ -104,10 +104,13 @@ class FlowItem extends PureComponent {
     copy_link(event) {
         event.preventDefault();
         copy(
-            `${event.target.href}\n`+
+            `${event.target.href}${this.props.info.tag ? ' 【'+this.props.info.tag+'】' : ''}\n`+
             `${this.props.info.text}${this.props.info.type==='image'?' [图片]':this.props.info.type==='audio'?' [语音]':''}\n`+
             `（${format_time(new Date(this.props.info.timestamp*1000))} ${this.props.info.likenum}关注 ${this.props.info.reply}回复）\n`+
-            this.props.replies.map((r)=>(r.text)).join('\n')
+            this.props.replies.map((r)=>(
+                (r.tag ? '【'+r.tag+'】' : '')+
+                r.text
+            )).join('\n')
         );
     }
 
diff --git a/src/Title.css b/src/Title.css
index 5abbfdb..ba43086 100644
--- a/src/Title.css
+++ b/src/Title.css
@@ -43,4 +43,8 @@
 
 .list-menu {
     text-align: center;
+}
+
+.help-desc-box p {
+    margin: .5em;
 }
\ No newline at end of file
diff --git a/src/Title.js b/src/Title.js
index f80b9a1..9c9d154 100644
--- a/src/Title.js
+++ b/src/Title.js
@@ -10,16 +10,26 @@ import './Title.css';
 const flag_re=/^\/\/setflag ([a-zA-Z0-9_]+)=(.*)$/;
 
 const HELP_TEXT=(
-    <div className="box">
-        <p className="centered-line">树洞网页版 by @xmcp</p>
-        <br />
+    <div className="box help-desc-box">
+        <p>
+            PKUHelper 网页版树洞 by @xmcp，
+            基于&nbsp;
+            <a href="https://www.gnu.org/licenses/gpl-3.0.zh-cn.html" target="_blank">GPLv3</a>
+            &nbsp;协议在 <a href="https://github.com/pkuhelper-web/webhole" target="_blank">GitHub</a> 开源
+        </p>
+        <p>
+            PKUHelper 网页版的诞生离不开&nbsp;
+            <a href="https://reactjs.org/" target="_blank" rel="noopener">React</a>
+            、
+            <a href="https://icomoon.io/#icons" target="_blank" rel="noopener">IcoMoon</a>
+            &nbsp;等开源项目
+        </p>
         <p>
             This program is free software: you can redistribute it and/or modify
             it under the terms of the GNU General Public License as published by
             the Free Software Foundation, either version 3 of the License, or
             (at your option) any later version.
         </p>
-        <br />
         <p>
             This program is distributed in the hope that it will be useful,
             but WITHOUT ANY WARRANTY; without even the implied warranty of
diff --git a/src/UserAction.js b/src/UserAction.js
index 80321b6..cc3d6d6 100644
--- a/src/UserAction.js
+++ b/src/UserAction.js
@@ -208,6 +208,10 @@ export class LoginForm extends Component {
                             <p>
                                 <b>您已登录。</b>
                                 <button type="button" onClick={()=>{token.set_value(null);}}>注销</button>
+                                <br />
+                            </p>
+                            <p>
+                                根据计算中心要求，访问授权三个月内有效。<br />若提示“授权过期”，请注销后重新登录。
                             </p>
                             <p>
                                 <a onClick={()=>{this.props.show_sidebar(