diff --git a/package-lock.json b/package-lock.json
index b17c672..fea1fff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10400,11 +10400,6 @@
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-16.9.0.tgz",
       "integrity": "sha512-tJBzzzIgnnRfEm046qRcURvwQnZVXmuCbscxUO5RWrGTXpon2d4c8mI0D8WE6ydVIm29JiLB6+RslkIvym9Rjw=="
     },
-    "react-lazyload": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/react-lazyload/-/react-lazyload-2.3.0.tgz",
-      "integrity": "sha512-0z3qmL+qtSERdfKFpn0yKXm+1Gg1ZLZBXnCzHhSGiu1L8iDARuCkbOypxEx9+ETxZvMnXj98xvWCs5jyXTuM2w=="
-    },
     "react-scripts": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/react-scripts/-/react-scripts-3.1.1.tgz",
diff --git a/package.json b/package.json
index 7d72df3..e7184f9 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,6 @@
     "pressure": "^2.1.2",
     "react": "^16.9.0",
     "react-dom": "^16.9.0",
-    "react-lazyload": "latest",
     "react-scripts": "^3.1.1",
     "react-timeago": "^4.1.9"
   },
diff --git a/public/index.html b/public/index.html
index ce420d2..d33c801 100644
--- a/public/index.html
+++ b/public/index.html
@@ -32,6 +32,7 @@
         _czc.push(["_setAccount","1274501752"]);
         _czc.push(["_setCustomVar","has_token",localStorage['TOKEN']?'yes':'no',1]);
         _czc.push(["_setCustomVar","standalone",((window.matchMedia('(display-mode: standalone)').matches) || (window.navigator.standalone))?'yes':'no',1]);
+        _czc.push(["_setCustomVar","build_info","%REACT_APP_BUILD_INFO%"||'---']);
         try {
             var config=JSON.parse(localStorage['hole_config']||'{}');
             for(var key in config)
diff --git a/src/BalanceShower.js b/src/BalanceShower.js
index 97f7c97..a68f037 100644
--- a/src/BalanceShower.js
+++ b/src/BalanceShower.js
@@ -15,9 +15,11 @@ export class BalanceShower extends PureComponent {
         };
     }
 
-    do_load(token) {
+    do_load(e,token) {
         if(this.state.loading_status==='loading')
             return;
+        if(e.target.closest('a')) // clicking at a link
+            return;
         if(!token || !window.config.easter_egg) {
             this.setState({
                 loading_status: 'idle',
@@ -71,7 +73,7 @@ export class BalanceShower extends PureComponent {
     render() {
         return (
             <TokenCtx.Consumer>{(token)=>(
-                <div onClick={()=>this.do_load(token.value)}>
+                <div onClick={(e)=>this.do_load(e,token.value)}>
                     <div className="balance-popover">{this.render_popover()}</div>
                     {this.props.children}
                 </div>
diff --git a/src/Common.css b/src/Common.css
index 9dcc83c..5891e20 100644
--- a/src/Common.css
+++ b/src/Common.css
@@ -12,7 +12,7 @@
 }
 
 .root-dark-mode .bg-img {
-    opacity: .6;
+    opacity: .65;
 }
 
 .black-outline {
diff --git a/src/Config.js b/src/Config.js
index 3e72483..fe851ea 100644
--- a/src/Config.js
+++ b/src/Config.js
@@ -152,7 +152,7 @@ class ConfigColorScheme extends PureComponent {
                     &nbsp; <small>#color_scheme</small>
                 </p>
                 <p>
-                    选择浅色或深色模式，或者与系统颜色模式一致
+                    选择浅色或深色模式，深色模式下将会调暗图片亮度
                 </p>
             </div>
         )
diff --git a/src/Flows.css b/src/Flows.css
index 64a6486..2d4a88a 100644
--- a/src/Flows.css
+++ b/src/Flows.css
@@ -161,7 +161,7 @@
 }
 
 .root-dark-mode .flow-item-row p.img img {
-    filter: brightness(.85);
+    filter: brightness(85%);
 }
 
 .box-header-badge {
diff --git a/src/Title.js b/src/Title.js
index aec7245..8eaead5 100644
--- a/src/Title.js
+++ b/src/Title.js
@@ -39,8 +39,8 @@ const HELP_TEXT=(
                 setTimeout(()=>{
                     window.location.reload(true);
                 },200);
-            }}>强制检查更新</a>&nbsp;
-            ({process.env.REACT_APP_BUILD_INFO||'---'} {process.env.NODE_ENV})
+            }}>强制检查更新</a>
+            （{process.env.REACT_APP_BUILD_INFO||'---'} {process.env.NODE_ENV} 会自动在后台检查更新并在下次访问时更新）
         </p>
         <p>
             This program is free software: you can redistribute it and/or modify
diff --git a/src/index.css b/src/index.css
index 2e26d85..9f46326 100644
--- a/src/index.css
+++ b/src/index.css
@@ -19,7 +19,7 @@ a {
     color: #00c;
 }
 
-.root-dark-mode .left-container a, .root-dark-mode .sidebar a, .root-dark-mode .sidebar-title a {
+.root-dark-mode .left-container a, .root-dark-mode .sidebar a, .root-dark-mode .sidebar-title a, .root-dark-mode .balance-popover a {
     color: #9bf;
 }
 
diff --git a/src/text_splitter.js b/src/text_splitter.js
index 241c5e7..02f1b16 100644
--- a/src/text_splitter.js
+++ b/src/text_splitter.js
@@ -1,6 +1,6 @@
 // regexp should match the WHOLE segmented part
-export const PID_RE=/(^|[^\d\u20e3\ufe0e\ufe0f])([1-9]\d{4,5})(?![\d\u20e3\ufe0e\ufe0f])/g;
-export const URL_PID_RE=/((?:https?:\/\/)?pkuhelper\.pku\.edu\.cn\/hole\/?#(?:#|%23)([1-9]\d{4,5}))(?!\d|\u20e3|\ufe0e|\ufe0f)/g;
+export const PID_RE=/(^|[^\d\u20e3\ufe0e\ufe0f])([2-9]\d{4,5}|1\d{4,6})(?![\d\u20e3\ufe0e\ufe0f])/g;
+export const URL_PID_RE=/((?:https?:\/\/)?pkuhelper\.pku\.edu\.cn\/hole\/?#(?:#|%23)([2-9]\d{4,5}|1\d{4,6}))(?!\d|\u20e3|\ufe0e|\ufe0f)/g;
 export const NICKNAME_RE=/(^|[^A-Za-z])((?:(?:Angry|Baby|Crazy|Diligent|Excited|Fat|Greedy|Hungry|Interesting|Jolly|Kind|Little|Magic|Naïve|Old|Powerful|Quiet|Rich|Superman|THU|Undefined|Valuable|Wifeless|Xiangbuchulai|Young|Zombie)\s)?(?:Alice|Bob|Carol|Dave|Eve|Francis|Grace|Hans|Isabella|Jason|Kate|Louis|Margaret|Nathan|Olivia|Paul|Queen|Richard|Susan|Thomas|Uma|Vivian|Winnie|Xander|Yasmine|Zach)|You Win(?: \d+)?|洞主)(?![A-Za-z])/gi;
 export const URL_RE=/(^|[^.@a-zA-Z0-9_])((?:https?:\/\/)?(?:(?:[\w-]+\.)+[a-zA-Z]{2,3}|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})(?::\d{1,5})?(?:\/[\w~!@#$%^&*()\-_=+[\]{};:,./?|]*)?)(?![a-zA-Z0-9])/gi;