diff --git a/src/App.js b/src/App.js
index c18da70b..5167e231 100644
--- a/src/App.js
+++ b/src/App.js
@@ -9,29 +9,6 @@ import {load_config,bgimg_style} from './Config';
 import ImasuguApp from './imasugu/src/App';
 
 function DeprecatedAlert(props) {
-    if(['pkuhelper.pku.edu.cn','127.0.0.1','localhost'].indexOf(document.domain)===-1)
-        return (
-            <div className="flow-item-row">
-                <div className="box box-tip aux-margin">
-                    <p><b>树洞又㕛叒换域名了！</b></p>
-                    <br />
-                    <p>记住树洞网页版新网址</p>
-                    <p><a href="http://pkuhelper.pku.edu.cn/hole">pkuhelper.pku.edu.cn/hole</a></p>
-                    <br />
-                    <p><small>当前域名我也不清楚什么时候停止维护。</small></p>
-                    <p><small>另外我们终于支持了 HTTPS 和 HTTP/2。</small></p>
-                    <br />
-                    <TokenCtx.Consumer>{(token)=>(
-                        !!token.value && <div>
-                            <p>*Tips: </p>
-                            <p>点击右上角的 <span className="icon icon-about" /> ，复制 User Token，在新网址的登录页面输入，就不用重发验证码了。</p>
-                            <br />
-                        </div>
-                    )}</TokenCtx.Consumer>
-                    <p>@xmcp from PKUHelper Team</p>
-                </div>
-            </div>
-        );
     return null;
 }
 
diff --git a/src/Common.js b/src/Common.js
index d50c9de4..f0d8992a 100644
--- a/src/Common.js
+++ b/src/Common.js
@@ -155,6 +155,7 @@ export class ClickHandler extends PureComponent {
         this.on_end_bound=this.on_end.bind(this);
 
         this.MOVE_THRESHOLD=3;
+        this.last_fire=0;
     }
 
     on_begin(e) {
@@ -178,12 +179,18 @@ export class ClickHandler extends PureComponent {
     on_end(event) {
         //console.log('end');
         if(!this.state.moved)
-            this.props.callback(event);
+            this.do_callback(event);
         this.setState({
             moved: true,
         });
     }
 
+    do_callback(event) {
+        if(this.last_fire+100>+new Date()) return;
+        this.last_fire=+new Date();
+        this.props.callback(event);
+    }
+
     render() {
         return (
             <div onTouchStart={this.on_begin_bound} onMouseDown={this.on_begin_bound}
diff --git a/src/Flows.js b/src/Flows.js
index 4d4973e6..1f7cd34b 100644
--- a/src/Flows.js
+++ b/src/Flows.js
@@ -549,7 +549,7 @@ function FlowChunk(props) {
             <div className="flow-chunk">
                 {!!props.title && <TitleLine text={props.title} />}
                 {props.list.map((info,ind)=>(
-                    <LazyLoad key={info.pid} offset={1500} height="15em" once={true} >
+                    <LazyLoad key={info.pid} offset={1500} height="15em" once={true}>
                         <div>
                             {!!(props.deletion_detect && props.mode==='list' && ind && props.list[ind-1].pid-info.pid>1) &&
                                 <div className="flow-item-row">
diff --git a/src/PressureHelper.css b/src/PressureHelper.css
index fa66f32c..3effa1f9 100644
--- a/src/PressureHelper.css
+++ b/src/PressureHelper.css
@@ -10,6 +10,10 @@
     visibility: hidden;
 }
 
+.pressure-no-select * {
+    user-select: none !important;
+}
+
 .pressure-box-fired {
     border-color: orangered;
     pointer-events: initial !important;
diff --git a/src/PressureHelper.js b/src/PressureHelper.js
index 92aedcb8..a1a2090b 100644
--- a/src/PressureHelper.js
+++ b/src/PressureHelper.js
@@ -41,8 +41,10 @@ export class PressureHelper extends  Component {
             Pressure.set(document.body, {
                 change: (force)=>{
                     if(!this.state.fired) {
-                        if(force>=.999)
+                        if(force>=.999) {
+                            document.body.classList.add('pressure-no-select');
                             this.do_fire();
+                        }
                         else
                             this.setState({
                                 level: force,
@@ -54,16 +56,13 @@ export class PressureHelper extends  Component {
                         level: 0,
                         fired: false,
                     });
+                    document.body.classList.remove('pressure-no-select');
                 },
             }, {
                 polyfill: false,
                 only: 'touch',
                 preventSelect: false,
             });
-            document.body.addEventListener('selectstart',(event)=>{
-                if(this.state.level>THRESHOLD)
-                    event.preventDefault();
-            });
 
             document.addEventListener('keydown',(e)=>{
                 if(!e.repeat && e.key==='Escape') {