diff --git a/package.json b/package.json
index 7dde2750..4d6bc989 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,7 @@
     "i18next-http-backend": "^3.0.2",
     "linkify-plugin-mention": "^4.2.0",
     "linkify-react": "^4.2.0",
+    "linkify-string": "^4.2.0",
     "linkifyjs": "^4.2.0",
     "localforage": "^1.10.0",
     "localforage-setitems": "^1.4.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 7d19957a..2d67520f 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -125,6 +125,9 @@ importers:
       linkify-react:
         specifier: ^4.2.0
         version: 4.2.0(linkifyjs@4.2.0)(react@19.0.0)
+      linkify-string:
+        specifier: ^4.2.0
+        version: 4.2.0(linkifyjs@4.2.0)
       linkifyjs:
         specifier: ^4.2.0
         version: 4.2.0
@@ -3909,6 +3912,11 @@ packages:
       linkifyjs: ^4.0.0
       react: '>= 15.0.0'
 
+  linkify-string@4.2.0:
+    resolution: {integrity: sha512-LqOKk0+RlqibFkxjPAGOL7Mfssqj6/SdG9QWGvzeVDpoWXhaw9OXxseCtFanjIl7C6UyTTZizhyGr4IWLfijiw==}
+    peerDependencies:
+      linkifyjs: ^4.0.0
+
   linkifyjs@4.2.0:
     resolution: {integrity: sha512-pCj3PrQyATaoTYKHrgWRF3SJwsm61udVh+vuls/Rl6SptiDhgE7ziUIudAedRY9QEfynmM7/RmLEfPUyw1HPCw==}
 
@@ -10109,6 +10117,10 @@ snapshots:
       linkifyjs: 4.2.0
       react: 19.0.0
 
+  linkify-string@4.2.0(linkifyjs@4.2.0):
+    dependencies:
+      linkifyjs: 4.2.0
+
   linkifyjs@4.2.0: {}
 
   loader-runner@4.3.0: {}
diff --git a/public/locales/en/setting.json b/public/locales/en/setting.json
index f42b2344..cfc3afca 100644
--- a/public/locales/en/setting.json
+++ b/public/locales/en/setting.json
@@ -33,7 +33,7 @@
     "id": "Channel ID",
     "name": "Channel Name",
     "topic": "Channel Topic",
-    "topic_placeholder": "Let everyone know how to use this channel.",
+    "topic_placeholder": "Let everyone know how to use this channel.(markdown supported)",
     "visibility": "Channel Visibility",
     "public": "Public",
     "private": "Private",
@@ -86,6 +86,12 @@
       "enable": "Enable",
       "disable": "Disable"
     },
+    "admin_only_can_invite": {
+      "title": "Only Admins Can Invite Users",
+      "desc": "If enabled, only admins can invite new members.",
+      "enable": "Enable",
+      "disable": "Disable"
+    },
     "enable_msg_url_preview": {
       "title": "Enable URL Preview in Message",
       "desc": "If enabled, url in message will show preview content.",
diff --git a/public/locales/pt/setting.json b/public/locales/pt/setting.json
index 5513a897..fc85d1a2 100644
--- a/public/locales/pt/setting.json
+++ b/public/locales/pt/setting.json
@@ -32,7 +32,7 @@
     "delete_desc": "Are you sure want to delete this channel?",
     "name": "Channel Name",
     "topic": "Channel Topic",
-    "topic_placeholder": "Let everyone know how to use this channel.",
+    "topic_placeholder": "Let everyone know how to use this channel.(markdown supported)",
     "visibility": "Channel Visibility",
     "public": "Public",
     "private": "Private"
diff --git a/public/locales/zh/setting.json b/public/locales/zh/setting.json
index 6cc038b4..00b068fc 100644
--- a/public/locales/zh/setting.json
+++ b/public/locales/zh/setting.json
@@ -33,7 +33,7 @@
     "id": "频道 ID",
     "name": "频道名",
     "topic": "频道主题",
-    "topic_placeholder": "让别人知道这个频道是用来做啥的",
+    "topic_placeholder": "让别人知道这个频道是用来做啥的（支持 markdown）",
     "visibility": "可见性",
     "public": "公开",
     "private": "私密",
@@ -85,6 +85,12 @@
       "enable": "开启",
       "disable": "关闭"
     },
+    "admin_only_can_invite": {
+      "title": "只有管理员可以邀请新用户",
+      "desc": "如果开启，只有管理员才能邀请新用户",
+      "enable": "开启",
+      "disable": "关闭"
+    },
     "enable_msg_url_preview": {
       "title": "开启消息网址预览",
       "desc": "如果开启，消息中的网址会显示预览内容",
diff --git a/src/app/config.ts b/src/app/config.ts
index 267d0444..4ad9a99e 100644
--- a/src/app/config.ts
+++ b/src/app/config.ts
@@ -208,6 +208,7 @@ export const getEmailNotifyDelayList = () => [
     value: 12 * 60 * 60,
   },
 ];
+export const KEY_ADMIN_ONLY_INVITE = `admin_only_can_invite`;
 export const KEY_ADMIN_SEE_CHANNEL_MEMBERS = `only_admin_can_see_channel_members`;
 export const KEY_MSG_URL_PREVIEW = `enable_msg_url_preview`;
 export default BASE_URL;
diff --git a/src/components/AddEntriesMenu.tsx b/src/components/AddEntriesMenu.tsx
index 1c6051c4..d75cd2ce 100644
--- a/src/components/AddEntriesMenu.tsx
+++ b/src/components/AddEntriesMenu.tsx
@@ -12,9 +12,13 @@ import InviteModal from "./InviteModal";
 import SearchUser from "./SearchUser";
 import UsersModal from "./UsersModal";
 import { shallowEqual } from "react-redux";
+import useServerExtSetting from "../hooks/useServerExtSetting";
+import { KEY_ADMIN_ONLY_INVITE } from "../app/config";
 
 export default function AddEntriesMenu() {
   const { t } = useTranslation();
+  const { getExtSetting } = useServerExtSetting();
+  const onlyAdminCanInvite = getExtSetting(KEY_ADMIN_ONLY_INVITE);
   const isAdmin = useAppSelector((store) => store.authData.user?.is_admin, shallowEqual);
   const onlyAdminCreateGroup = useAppSelector(
     (store) => store.server.only_admin_can_create_group,
@@ -62,6 +66,7 @@ export default function AddEntriesMenu() {
     "rounded flex items-center gap-2 text-sm font-semibold cursor-pointer px-2 py-2.5 md:hover:bg-gray-800/20 md:dark:hover:bg-gray-200/20";
   const iconClass = "w-5 h-5 dark:fill-gray-300";
   const canPrivateGroup = onlyAdminCreateGroup ? isAdmin : true;
+  const showInvite = isAdmin || !onlyAdminCanInvite;
   return (
     <>
       <ul className="flex flex-col rounded-xl drop-shadow p-1 select-none text-gray-500 dark:text-gray-300 bg-white dark:bg-black">
@@ -82,10 +87,12 @@ export default function AddEntriesMenu() {
           <IconMention className={iconClass} />
           {t("action.new_msg")}
         </li>
-        <li className={itemClass} onClick={toggleInviteModalVisible}>
-          <IconInvite className={iconClass} />
-          {t("action.invite_people")}
-        </li>
+        {showInvite && (
+          <li className={itemClass} onClick={toggleInviteModalVisible}>
+            <IconInvite className={iconClass} />
+            {t("action.invite_people")}
+          </li>
+        )}
         <li className={itemClass} onClick={toggleSearchModalVisible}>
           <IconSearch className={iconClass} />
           {t("action.search_people")}
diff --git a/src/components/MarkdownRender.tsx b/src/components/MarkdownRender.tsx
index d4f924ae..61eb18d8 100644
--- a/src/components/MarkdownRender.tsx
+++ b/src/components/MarkdownRender.tsx
@@ -16,9 +16,10 @@ import { isDarkMode } from "../utils";
 import ImagePreview from "./ImagePreview";
 
 interface IProps {
+  cleanMode?: boolean;
   content: string;
 }
-const MarkdownRender: FC<IProps> = ({ content }) => {
+const MarkdownRender: FC<IProps> = ({ content, cleanMode = false }) => {
   const mdContainer = useRef<HTMLDivElement | null>(null);
   useEffect(() => {
     if (mdContainer.current) {
@@ -28,7 +29,8 @@ const MarkdownRender: FC<IProps> = ({ content }) => {
       });
     }
   }, [mdContainer]);
-
+  if (cleanMode)
+    return <Viewer initialValue={content} theme={isDarkMode() ? "dark" : "light"}></Viewer>;
   return (
     <>
       <ImagePreview container={mdContainer.current} context="markdown" />
diff --git a/src/components/Meta.tsx b/src/components/Meta.tsx
index ece7c9e1..e87cb097 100644
--- a/src/components/Meta.tsx
+++ b/src/components/Meta.tsx
@@ -1,15 +1,15 @@
-import { FC } from "react";
 import { useAppSelector } from "@/app/store";
 import { useGetServerQuery } from "@/app/services/server";
 import { shallowEqual } from "react-redux";
 
-type Props = {};
-const Meta: FC<Props> = () => {
+const Meta = () => {
   useGetServerQuery();
   const { name, logo } = useAppSelector((store) => store.server, shallowEqual);
+  console.log({name});
+  if(!name) return null
   return (
     <>
-      {name && <title>{name} Web App</title>}
+      {name && <title>{`${name} Web App`}</title>}
       {logo && <link rel="icon" href={`${logo}?ts=${new Date().getTime()}`} />}
     </>
   );
diff --git a/src/routes/chat/Layout/VirtualMessageFeed/CustomHeader.tsx b/src/routes/chat/Layout/VirtualMessageFeed/CustomHeader.tsx
index e6a511c2..9dc7d86b 100644
--- a/src/routes/chat/Layout/VirtualMessageFeed/CustomHeader.tsx
+++ b/src/routes/chat/Layout/VirtualMessageFeed/CustomHeader.tsx
@@ -6,6 +6,7 @@ import clsx from "clsx";
 import { useAppSelector } from "@/app/store";
 import EditIcon from "@/assets/icons/edit.svg";
 import { shallowEqual } from "react-redux";
+import linkifyStr from "linkify-string";
 
 type ChannelHeaderProps = {
   cid: number;
@@ -15,12 +16,18 @@ const ChannelHeader = ({ cid }: ChannelHeaderProps) => {
   const { t } = useTranslation("chat");
   const isAdmin = useAppSelector((store) => store.authData.user?.is_admin, shallowEqual);
   const data = useAppSelector((store) => store.channels.byId[cid], shallowEqual);
+  const desc = data.description
+    ? linkifyStr(data.description, { target: "_blank" })
+    : t("welcome_desc", { name: data?.name });
   return (
     <div className="pt-14 px-1 md:px-0 flex flex-col items-start gap-2">
       <h2 className="font-bold text-4xl dark:text-white">
         {t("welcome_channel", { name: data?.name })}
       </h2>
-      <p className="text-gray-600 dark:text-gray-300">{t("welcome_desc", { name: data?.name })} </p>
+      <p
+        className="text-gray-600 dark:text-gray-300 [&>a]:text-blue-500 [&>a]:hover:underline"
+        dangerouslySetInnerHTML={{ __html: desc }}
+      />
       {isAdmin && (
         <NavLink
           to={`/setting/channel/${cid}/overview?f=${pathname}`}
diff --git a/src/routes/setting/Overview/WhoCanInviteUsers.tsx b/src/routes/setting/Overview/WhoCanInviteUsers.tsx
new file mode 100644
index 00000000..d88484a2
--- /dev/null
+++ b/src/routes/setting/Overview/WhoCanInviteUsers.tsx
@@ -0,0 +1,28 @@
+import SettingBlock from "@/components/SettingBlock";
+import { useTranslation } from "react-i18next";
+import ServerVersionChecker from "@/components/ServerVersionChecker";
+import { KEY_ADMIN_ONLY_INVITE } from "@/app/config";
+import useServerExtSetting from "@/hooks/useServerExtSetting";
+import Toggle from "@/components/styled/Toggle";
+
+type Props = {};
+
+const WhoCanInviteUsers = ({}: Props) => {
+  const { updateExtSetting, getExtSetting } = useServerExtSetting();
+  const { t } = useTranslation("setting");
+  const adminOnlyCanInvite = getExtSetting(KEY_ADMIN_ONLY_INVITE);
+  const handleToggle = () => {
+    updateExtSetting(KEY_ADMIN_ONLY_INVITE, !adminOnlyCanInvite);
+  };
+  return (
+    <ServerVersionChecker empty version="0.3.50">
+      <SettingBlock
+        title={t("overview.admin_only_can_invite.title")}
+        desc={t("overview.admin_only_can_invite.desc")}
+        toggler={<Toggle onClick={handleToggle} checked={adminOnlyCanInvite} />}
+      ></SettingBlock>
+    </ServerVersionChecker>
+  );
+};
+
+export default WhoCanInviteUsers;
diff --git a/src/routes/setting/Overview/index.tsx b/src/routes/setting/Overview/index.tsx
index 0ad05f28..71682ae2 100644
--- a/src/routes/setting/Overview/index.tsx
+++ b/src/routes/setting/Overview/index.tsx
@@ -18,6 +18,7 @@ import ServerMsgNotify from "./ServerMsgEmailNotify";
 import GuestMode from "./GuestMode";
 import WhoCanSignUpSetting from "./WhoCanSignUpSetting";
 import UserMsgEmailNotify from "./UserMsgEmailNotify";
+import WhoCanInviteUsers from "./WhoCanInviteUsers";
 
 export default function Overview() {
   const { t } = useTranslation("setting");
@@ -42,6 +43,7 @@ export default function Overview() {
           {/* 只有 admin 能创建群组 */}
 
           <EnableURLPreviewInMsg />
+          <WhoCanInviteUsers />
           <OnlyAdminCanSeeChannelMembers />
           {/* 访客模式 */}
           <GuestMode />
diff --git a/src/types/server.ts b/src/types/server.ts
index ea4045d4..a2edd31c 100644
--- a/src/types/server.ts
+++ b/src/types/server.ts
@@ -15,6 +15,7 @@ export interface SystemCommon {
   chat_layout_mode?: ChatLayout;
   max_file_expiry_mode?: MessageExpireMode;
   only_admin_can_create_group: boolean;
+  who_can_invite_users: boolean;
   ext_setting: null | string;
   msg_smtp_notify_enable: boolean;
   msg_smtp_notify_delay_seconds: number;