diff --git a/src/Common.js b/src/Common.js
index cf2f9cb..daf29ac 100644
--- a/src/Common.js
+++ b/src/Common.js
@@ -9,6 +9,7 @@ import {
   URL_RE,
   PID_RE,
   NICKNAME_RE,
+  TAG_RE,
   split_text,
 } from './text_splitter';
 
@@ -67,6 +68,7 @@ function normalize_url(url) {
   return /^https?:\/\//.test(url) ? url : 'http://' + url;
 }
 
+/*
 export class HighlightedText extends PureComponent {
   render() {
     return (
@@ -109,6 +111,7 @@ export class HighlightedText extends PureComponent {
     );
   }
 }
+*/
 
 // props: text, show_pid, color_picker
 export class HighlightedMarkdown extends Component {
@@ -116,12 +119,6 @@ export class HighlightedMarkdown extends Component {
     const props = this.props;
     const processDefs = new HtmlToReact.ProcessNodeDefinitions(React);
     const processInstructions = [
-      {
-        shouldProcessNode: (node) => node.name === 'img', // disable images
-        processNode(node, children, index) {
-          return <div key={index}>[图片]</div>;
-        },
-      },
       {
         shouldProcessNode: (node) => /^h[123456]$/.test(node.name),
         processNode(node, children, index) {
@@ -131,6 +128,26 @@ export class HighlightedMarkdown extends Component {
           return <HeadingTag key={index}>{children}</HeadingTag>;
         },
       },
+      {
+        shouldProcessNode: (node) => node.name === 'img',
+        processNode(node, index) {
+          return (
+            <a
+              href={normalize_url(node.attribs.src)}
+              target="_blank"
+              rel="noopenner noreferrer"
+              className="ext-link"
+              key={index}
+            >
+              <img
+                src={normalize_url(node.attribs.src)}
+                alt={node.alt}
+                referrerpolicy="no-referrer"
+              />
+            </a>
+          );
+        },
+      },
       {
         shouldProcessNode: (node) => node.name === 'a',
         processNode(node, children, index) {
@@ -164,7 +181,7 @@ export class HighlightedMarkdown extends Component {
             ['url', URL_RE],
             ['pid', PID_RE],
             ['nickname', NICKNAME_RE],
-            //TODO: tag
+            ['tag', TAG_RE],
           ]);
 
           return (
@@ -202,6 +219,12 @@ export class HighlightedMarkdown extends Component {
                       </ColoredSpan>
                     ) : rule === 'search' ? (
                       <span className="search-query-highlight">{p}</span>
+                    ) : rule === 'tag' ? (
+                      <a
+                        href={p}
+                      >
+                        {p}
+                      </a>
                     ) : (
                       p
                     )}
diff --git a/src/Flows.css b/src/Flows.css
index 0e1bcf2..45a5b23 100644
--- a/src/Flows.css
+++ b/src/Flows.css
@@ -193,6 +193,17 @@
     overflow-x: auto;
 }
 
+.box-content img {
+  max-width: 100%;
+  max-height: 2000px;
+  display: block;
+  margin: 0 auto;
+}
+
+.left-container .box-content img {
+  max-height: 500px;
+}
+
 .left-container .box-content {
     max-height: calc(100vh + 15em);
     overflow-y: hidden;
diff --git a/src/Flows.js b/src/Flows.js
index ffc8f76..5b4b47d 100644
--- a/src/Flows.js
+++ b/src/Flows.js
@@ -7,6 +7,7 @@ import {
   PID_RE,
   URL_RE,
   URL_PID_RE,
+  TAG_RE,
 } from './text_splitter';
 import {
   format_time,
@@ -665,7 +666,7 @@ class FlowItemRow extends PureComponent {
   constructor(props) {
     super(props);
     this.needFold = props.info.cw &&
-      (props.search_param === '热榜' || !props.search_param) &&
+      !props.search_param &&
       (window.config.whitelist_cw.indexOf('*')==-1 && window.config.whitelist_cw.indexOf(props.info.cw)==-1) &&
       props.mode !== 'attention' && props.mode !== 'attention_finished';
     this.state = {
@@ -770,6 +771,7 @@ class FlowItemRow extends PureComponent {
       ['url', URL_RE],
       ['pid', PID_RE],
       ['nickname', NICKNAME_RE],
+      ['tag', TAG_RE],
     ];
     if (this.props.search_param) {
       hl_rules.push([
@@ -781,6 +783,8 @@ class FlowItemRow extends PureComponent {
     }
     let parts = split_text(this.state.info.text, hl_rules);
 
+    //console.log('hl:', parts,this.state.info.pid);
+
     let quote_id = null;
     if (!this.props.is_quote)
       for (let [mode, content] of parts) {
diff --git a/src/Title.js b/src/Title.js
index 99b6205..983e9f2 100644
--- a/src/Title.js
+++ b/src/Title.js
@@ -35,6 +35,24 @@ class ControlBar extends PureComponent {
         },
       );
     }
+
+    window.addEventListener("hashchange",
+      () => {
+        let text = decodeURIComponent(window.location.hash).substr(1);
+        if(text && text[0]!='#') {
+          console.log('search', text);
+          this.setState(
+            {
+              search_text: text,
+            },
+            () => {
+              this.on_keypress({ key: 'Enter' });
+            },
+          );
+        }
+      },
+      false
+    );
   }
 
   on_change(event) {
@@ -116,9 +134,8 @@ class ControlBar extends PureComponent {
             <input
               className="control-search"
               value={this.state.search_text}
-              placeholder={`${
-                this.props.mode === 'attention' ? '在关注列表中' : ''
-              }搜索 或 #树洞号`}
+              placeholder={
+                this.props.mode === 'attention' ? '在关注列表中搜索' : '搜tag或 #树洞号, 如: 新手导引'}
               onChange={this.on_change_bound}
               onKeyPress={this.on_keypress_bound}
             />
diff --git a/src/UserAction.js b/src/UserAction.js
index 2a60da9..e5828d4 100644
--- a/src/UserAction.js
+++ b/src/UserAction.js
@@ -541,6 +541,7 @@ export class PostForm extends Component {
   on_submit(event) {
     if (event) event.preventDefault();
     if (this.state.loading_status === 'loading') return;
+    /*
     if (this.img_ref.current.files.length) {
       this.setState({
         loading_status: 'processing',
@@ -555,7 +556,8 @@ export class PostForm extends Component {
         .catch((e) => {
           alert(e);
         });
-    } else {
+    } else */
+    {
       this.setState({
         loading_status: 'loading',
       });
@@ -573,6 +575,7 @@ export class PostForm extends Component {
     return (
       <form onSubmit={this.on_submit.bind(this)} className="post-form box">
         <div className="post-form-bar">
+          {/*
           <label>
             图片
             <input
@@ -583,6 +586,7 @@ export class PostForm extends Component {
               onChange={this.on_img_change_bound}
             />
           </label>
+          */}
 
           {this.state.preview ? (
             <button
@@ -665,7 +669,28 @@ export class PostForm extends Component {
             <a href="https://thuhole.com/policy.html" target="_blank">
               树洞管理规范（试行）
             </a>
-            ，文明发言
+            ，文明发言。
+          </small>
+        </p>
+        <p>
+          <small>
+            插入图片请使用图片外链，Markdown格式 ![](图片链接)， 支持动图，支持多图。推荐的图床： 
+            <a href="https://imgchr.com/" target="_blank">
+              路过图床
+            </a>
+            、
+            <a href="https://sm.ms/" target="_blank">
+              sm.ms
+            </a>
+            、
+            <a href="https://bbs.pku.edu.cn/v2/post-read.php?bid=154&threadid=3743" target="_blank">
+              未名BBS
+            </a>
+            、
+            <a href="https://zhuanlan.zhihu.com/write" target="_blank">
+              知乎
+            </a>
+            。
           </small>
         </p>
       </form>
diff --git a/src/text_splitter.js b/src/text_splitter.js
index 64cedcd..0bc728e 100644
--- a/src/text_splitter.js
+++ b/src/text_splitter.js
@@ -7,6 +7,8 @@ export const URL_PID_RE = /((?:https?:\/\/)?thuhole\.com\/?#(?:#|%23)(\d{1,7}))(
 export const NICKNAME_RE = /(^|[^A-Za-z])((?:(?:Angry|Baby|Crazy|Diligent|Excited|Fat|Greedy|Hungry|Interesting|Jolly|Kind|Little|Magic|Naïve|Old|PKU|Quiet|Rich|Superman|Tough|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;
 
+export const TAG_RE = /(^|\s)(#[^#\s]{1,32})($|\s|#)/g;
+
 export function split_text(txt, rules) {
   // rules: [['name',/regex/],...]
   // return: [['name','part'],[null,'part'],...]