diff --git a/src/app/config.ts b/src/app/config.ts
index bf1552e9..92325d40 100644
--- a/src/app/config.ts
+++ b/src/app/config.ts
@@ -11,12 +11,15 @@ let prices: Price[] = [
     type: "booking",
   }
 ];
-
-const local_dev = `https://dev.voce.chat`;
+const official_dev = `https://dev.voce.chat`;
+// const local_dev = `http://07333.qicp.vip:3030`;
+const local_dev = official_dev;
 // const local_dev = `http://localhost:3333`;
 export const BASE_ORIGIN = process.env.REACT_APP_RELEASE
   ? `${location.origin}`
   : local_dev;
+export const IS_OFFICIAL_DEMO = BASE_ORIGIN === official_dev;
+
 const BASE_URL = `${BASE_ORIGIN}/api`;
 export const getLicensePriceList = () => {
   const ps = prices.map((p, idx) => {
@@ -69,7 +72,7 @@ export const PAYMENT_URL_PREFIX =
   process.env.NODE_ENV === "production"
     ? `https://vera.nicegoodthings.com`
     : `http://localhost:4000`;
-export const CACHE_VERSION = `0.3.33`;
+export const CACHE_VERSION = `0.3.36`;
 export const GuestRoutes = ["/", "/chat", "/chat/channel/:channel_id"];
 export const ContentTypes = {
   text: "text/plain",
diff --git a/src/app/services/server.ts b/src/app/services/server.ts
index bc636791..301f1ae4 100644
--- a/src/app/services/server.ts
+++ b/src/app/services/server.ts
@@ -1,5 +1,5 @@
 import { createApi } from "@reduxjs/toolkit/query/react";
-import BASE_URL, { ContentTypes, PAYMENT_URL_PREFIX } from "../config";
+import BASE_URL, { ContentTypes, IS_OFFICIAL_DEMO, PAYMENT_URL_PREFIX } from "../config";
 import { updateInfo } from "../slices/server";
 import baseQuery from "./base.query";
 import { RootState } from "../store";
@@ -214,7 +214,24 @@ export const serverApi = createApi({
     getLicense: builder.query<LicenseResponse, void>({
       query: () => ({
         url: `/license`
-      })
+      }),
+      async onQueryStarted(data, { dispatch, queryFulfilled, getState }) {
+        // vocechat官方demo 则忽略
+        if (IS_OFFICIAL_DEMO) return;
+        const rootStore = getState() as RootState;
+        const { upgraded: prevValue } = rootStore.server;
+        try {
+          const { data: { user_limit } } = await queryFulfilled;
+          const currValue = user_limit > 20;
+          if (prevValue !== currValue) {
+            dispatch(updateInfo({ upgraded: currValue }));
+          }
+        } catch {
+          console.error("update license upgraded status failed ");
+
+        }
+
+      }
     }),
 
     getLicensePaymentUrl: builder.mutation<RenewLicenseResponse, RenewLicense>({
diff --git a/src/app/slices/server.ts b/src/app/slices/server.ts
index 5eac6755..879411b9 100644
--- a/src/app/slices/server.ts
+++ b/src/app/slices/server.ts
@@ -2,6 +2,7 @@ import { createSlice, PayloadAction } from "@reduxjs/toolkit";
 import { Server } from "../../types/server";
 
 export interface StoredServer extends Server {
+  upgraded: boolean,
   logo: string;
   inviteLink?: {
     link: string;
@@ -9,6 +10,7 @@ export interface StoredServer extends Server {
   };
 }
 const initialState: StoredServer = {
+  upgraded: false,
   name: "",
   description: "",
   logo: "",
@@ -27,6 +29,7 @@ const serverSlice = createSlice({
     },
     fillServer(state, action: PayloadAction<StoredServer>) {
       const {
+        upgraded = false,
         inviteLink = {
           link: "",
           expire: 0
@@ -35,7 +38,7 @@ const serverSlice = createSlice({
         name = "",
         description = ""
       } = action.payload || {};
-      return { name, logo, description, inviteLink };
+      return { upgraded, name, logo, description, inviteLink };
     },
     updateInfo(state, action: PayloadAction<Partial<StoredServer>>) {
       const values = action.payload || {};
diff --git a/src/common/component/BlankPlaceholder.tsx b/src/common/component/BlankPlaceholder.tsx
index d7ac7e04..4268398f 100644
--- a/src/common/component/BlankPlaceholder.tsx
+++ b/src/common/component/BlankPlaceholder.tsx
@@ -12,6 +12,7 @@ import IconInvite from "../../assets/icons/placeholder.invite.svg";
 import IconDownload from "../../assets/icons/placeholder.download.svg";
 import UsersModal from "./UsersModal";
 import { useAppSelector } from "../../app/store";
+import useLicense from "../hook/useLicense";
 
 
 interface Props {
@@ -28,6 +29,7 @@ const BlankPlaceholder: FC<Props> = ({ type = "chat" }) => {
   const [inviteModalVisible, setInviteModalVisible] = useState(false);
   const [createChannelVisible, setCreateChannelVisible] = useState(false);
   const [userListVisible, setUserListVisible] = useState(false);
+  const { upgraded } = useLicense();
   const toggleChannelModalVisible = () => {
     setCreateChannelVisible((prev) => !prev);
   };
@@ -45,13 +47,11 @@ const BlankPlaceholder: FC<Props> = ({ type = "chat" }) => {
       <div className="flex flex-col gap-8 -mt-[50px] dark:bg-gray-700">
         <div className="flex flex-col gap-2 items-center group">
           <h2 className="text-center text-3xl text-slate-700 dark:text-white font-bold">{t("title", { name: server.name })}</h2>
-          <p className="text-sm text-gray-400 max-w-md text-center relative break-all">
+          <p className="text-sm text-gray-400 max-w-md text-center relative break-all whitespace-pre">
             <Linkify options={
               {
                 render: {
                   url: ({ content, attributes: { href: link } }) => {
-                    // console.log("attr", link);
-                    // if (!url) return <>{content}</>;
                     return <>
                       <a className="text-primary-400" target="_blank" href={link} rel="noreferrer">
                         {content}
@@ -77,14 +77,17 @@ const BlankPlaceholder: FC<Props> = ({ type = "chat" }) => {
             <IconChat className={classes.boxIcon} />
             <div className={classes.boxTip}>{chatTip}</div>
           </button>
-          <a href={"https://voce.chat#download"} target={"_blank"} rel="noreferrer" className={classes.box} >
-            <IconDownload className={classes.boxIcon} />
-            <div className={classes.boxTip}>{t("download")}</div>
-          </a>
-          <a href={"https://doc.voce.chat"} target={"_blank"} rel="noreferrer" className={classes.box} >
-            <IconAsk className={classes.boxIcon} />
-            <div className={classes.boxTip}>{t("help")}</div>
-          </a>
+          {!upgraded && <>
+            <a href={"https://voce.chat#download"} target={"_blank"} rel="noreferrer" className={classes.box} >
+              <IconDownload className={classes.boxIcon} />
+              <div className={classes.boxTip}>{t("download")}</div>
+            </a>
+            <a href={"https://doc.voce.chat"} target={"_blank"} rel="noreferrer" className={classes.box} >
+              <IconAsk className={classes.boxIcon} />
+              <div className={classes.boxTip}>{t("help")}</div>
+            </a>
+          </>
+          }
         </div>
       </div>
       {createChannelVisible && (
diff --git a/src/common/hook/useLicense.ts b/src/common/hook/useLicense.ts
index ccc73628..78aa249c 100644
--- a/src/common/hook/useLicense.ts
+++ b/src/common/hook/useLicense.ts
@@ -7,8 +7,8 @@ import {
 import { useAppSelector } from "../../app/store";
 
 const useLicense = () => {
-  const { userCount, isGuest } = useAppSelector((store) => {
-    return { userCount: store.users.ids.length, isGuest: store.authData.guest };
+  const { userCount, isGuest, upgraded } = useAppSelector((store) => {
+    return { userCount: store.users.ids.length, isGuest: store.authData.guest, upgraded: store.server.upgraded };
   });
   const { data: license, refetch: refetchLicense } = useGetLicenseQuery(undefined, {
     refetchOnMountOrArgChange: true,
@@ -36,6 +36,7 @@ const useLicense = () => {
   }, [upserted]);
   const lUserLimit = license?.user_limit ?? Number.MAX_SAFE_INTEGER;
   return {
+    upgraded,
     reachLimit: userCount >= lUserLimit,
     license,
     checked,
diff --git a/src/routes/setting/navs.tsx b/src/routes/setting/navs.tsx
index a94139c3..261fe5b1 100644
--- a/src/routes/setting/navs.tsx
+++ b/src/routes/setting/navs.tsx
@@ -1,3 +1,4 @@
+import { useTranslation } from "react-i18next";
 import MyAccount from "./MyAccount";
 import Overview from "./Overview";
 import Logins from "./config/Logins";
@@ -12,7 +13,6 @@ import ManageMembers from "../../common/component/ManageMembers";
 import Version from "../../common/component/Version";
 // import ConfigAgora from "./config/Agora";
 import { useAppSelector } from "../../app/store";
-import { useTranslation } from "react-i18next";
 import ServerVersionChecker from "../../common/component/ServerVersionChecker";
 import useLicense from "../../common/hook/useLicense";
 
@@ -98,7 +98,7 @@ const navs = [
 ];
 
 const useNavs = () => {
-  const { license: licenseInfo } = useLicense();
+  const { upgraded } = useLicense();
   const { t } = useTranslation("setting");
   const loginUser = useAppSelector((store) => {
     return store.authData.user;
@@ -107,11 +107,13 @@ const useNavs = () => {
     const { name, items, ...rest } = n;
     return {
       name,
+      // @ts-ignore
       title: t(`nav.${name}`),
       items: items.map(item => {
         const { name, ...rest } = item;
         return {
           name,
+          // @ts-ignore
           title: t(`nav.${name}`),
           ...rest
         };
@@ -126,7 +128,7 @@ const useNavs = () => {
       // about 特殊处理下
       if (nav.name == "about") {
         // 有付费，但是普通用户，则不显示about
-        return licenseInfo?.user_limit === 20;
+        return !upgraded;
       } else {
         return !nav.admin;
       }