diff --git a/.env b/.env
new file mode 100644
index 0000000..f339eb3
--- /dev/null
+++ b/.env
@@ -0,0 +1,14 @@
+# 端口
+PORT=3000
+
+# MongoDB 连接地址，如果 MongoDB 在本机默认端口
+DB_CONNECTION="mongodb://localhost:27017/livepoll"
+
+# 密码加密复杂度
+SALT_ROUNDS=6
+
+# JWT 私钥（可以随便写一串随机字符）
+JWT_PRIVATE="your-secret-jwt-key"
+
+# 前端访问地址（群友打开的链接）
+CLIENT_URL="http://110.42.109.143:3000"
diff --git a/backend/src/controllers/user.controller.js b/backend/src/controllers/user.controller.js
index 2e79b80..fb12647 100644
--- a/backend/src/controllers/user.controller.js
+++ b/backend/src/controllers/user.controller.js
@@ -31,8 +31,8 @@ export async function signinController(req, res) {
     const { token, userData } = await signinService(email, password);
     res.cookie("livepoll-access-token", token, {
       httpOnly: true,    
-      secure: true,      
-      sameSite: "None", 
+      secure: false,      
+      sameSite: "Lax", 
       expires: new Date(Date.now() + 24 * 60 * 60 * 1000 * 365), // 1 year
       path: "/"
     }).status(200).json({
diff --git a/frontend/.env b/frontend/.env
index d40a145..8c264d6 100644
--- a/frontend/.env
+++ b/frontend/.env
@@ -1 +1 @@
-VITE_BACKEND_URL="https://livepoll-anjx.onrender.com"
\ No newline at end of file
+VITE_BACKEND_URL="http://localhost:3000"
diff --git a/frontend/src/components/Header/Header.jsx b/frontend/src/components/Header/Header.jsx
index 0c3e2ce..4657e8e 100644
--- a/frontend/src/components/Header/Header.jsx
+++ b/frontend/src/components/Header/Header.jsx
@@ -17,15 +17,15 @@ function Header() {
         <ul className="menu menu-horizontal px-1 gap-1">
           {user.username ? (
             <li>
-              <Link to={"/dashboard"}>Dashboard</Link>
+              <Link to={"/dashboard"}>仪表盘</Link>
             </li>
           ) : (
             <li>
-              <Link to={"/login"}>Login</Link>
+              <Link to={"/login"}>登陆</Link>
             </li>
           )}
           <li>
-            <Link to={"/poll"}>Polls</Link>
+            <Link to={"/poll"}>投票列表</Link>
           </li>
         </ul>
       </div>
diff --git a/frontend/src/helper/axiosInstance.js b/frontend/src/helper/axiosInstance.js
index 9ae963d..24d00de 100644
--- a/frontend/src/helper/axiosInstance.js
+++ b/frontend/src/helper/axiosInstance.js
@@ -1,8 +1,8 @@
 import axios from "axios";
 
 const axiosInstance = axios.create({
-  // baseURL: `http://localhost:3000/api/v1`,
-  baseURL: `https://livepoll-anjx.onrender.com/api/v1`,
+  baseURL: `http://110.42.109.143:3000/api/v1`,
+  //baseURL: `https://livepoll-anjx.onrender.com/api/v1`,
   withCredentials: true,
   headers: {
     "Content-Type": "application/json",
diff --git a/frontend/src/pages/Home.jsx b/frontend/src/pages/Home.jsx
index 9355bd6..b9533a6 100644
--- a/frontend/src/pages/Home.jsx
+++ b/frontend/src/pages/Home.jsx
@@ -3,37 +3,33 @@ import { useNavigate } from 'react-router-dom';
 import useStore from '../store/useStore';
 
 function Home() {
-
   const navigator = useNavigate();
 
   return (
     <div className="flex bg-base-200 min-h-screen flex-col items-center text-white p-8">
-      <h1 className="text-4xl mt-2 md:text-5xl font-bold mb-6 text-center flex flex-col gap-2 md:block">Welcome to <span className='bg-slate-800 px-4 rounded-md relative'>LivePoll</span></h1>
+      <h1 className="text-4xl mt-2 md:text-5xl font-bold mb-6 text-center flex flex-col gap-2 md:block">
+        欢迎来到 <span className='bg-slate-800 px-4 rounded-md relative'>LivePoll</span>
+      </h1>
       <p className="text-lg text-center max-w-2xl mb-8">
-        LivePoll is your platform for real-time, interactive polling. Create polls, participate in
-        active discussions, and get instant feedback with live updates and visualizations. Discover
-        what people think on topics that matter to you and have your voice heard!
+        LivePoll 是您进行实时互动投票的平台。创建投票，参与活跃讨论，并通过实时更新和可视化获得即时反馈。探索人们对您关心话题的看法，让您的声音被听到！
       </p>
       <div className="flex flex-col lg:flex-row gap-6 mb-8">
         <div className="bg-base-300 p-6 rounded-lg shadow-md w-full lg:w-96 text-center">
-          <h2 className="text-3xl font-semibold mb-4">Create Polls</h2>
+          <h2 className="text-3xl font-semibold mb-4">创建投票</h2>
           <p className="text-gray-400">
-            Create custom polls on any topic and share them with others. Add options, set
-            permissions, and see the responses roll in real-time.
+            创建关于任何主题的自定义投票并与他人分享。添加选项，设置权限，并实时查看响应结果。
           </p>
         </div>
         <div className="bg-base-300 p-6 rounded-lg shadow-md w-full lg:w-96 text-center">
-          <h2 className="text-3xl font-semibold mb-4">Vote & Participate</h2>
+          <h2 className="text-3xl font-semibold mb-4">投票与参与</h2>
           <p className="text-gray-400">
-            Browse a variety of public polls or join private ones shared with you. Cast your vote
-            and see the real-time results as others participate.
+            浏览各种公开投票或加入与您分享的私人投票。投出您的一票，并在他人参与时查看实时结果。
           </p>
         </div>
         <div className="bg-base-300 p-6 rounded-lg shadow-md w-full lg:w-96 text-center">
-          <h2 className="text-3xl font-semibold mb-4">Bookmark & Track</h2>
+          <h2 className="text-3xl font-semibold mb-4">收藏与追踪</h2>
           <p className="text-gray-400">
-            Bookmark polls to save them for later, view your past participation, and stay updated
-            on topics you care about.
+            收藏投票以便稍后查看，查看您过去的参与记录，并随时了解您关心的话题动态。
           </p>
         </div>
       </div>
@@ -41,7 +37,7 @@ function Home() {
         className="btn btn-primary px-6 py-3 font-semibold text-lg"
         onClick={() => navigator("/dashboard")}
       >
-        Make a Poll
+        创建投票
       </button>
     </div>
   )
diff --git a/frontend/src/pages/LoginPage.jsx b/frontend/src/pages/LoginPage.jsx
index 82ade94..24a9e5a 100644
--- a/frontend/src/pages/LoginPage.jsx
+++ b/frontend/src/pages/LoginPage.jsx
@@ -41,75 +41,75 @@ const LoginPage = () => {
   return (
     <div className="flex justify-center bg-base-200 h-screen  p-4">
       <div className="w-full max-w-md  rounded-lg  p-8">
-        <h2 className="text-2xl font-semibold text-center text-white mb-6">Login</h2>
+        <h2 className="text-2xl font-semibold text-center text-white mb-6">登录</h2>
         
         <form className="space-y-4">
-          {/* Email Input */}
+          {/* 邮箱输入 */}
           <div className="form-control w-full">
             <label className="label">
-              <span className="label-text text-gray-200">Email</span>
+              <span className="label-text text-gray-200">邮箱</span>
             </label>
             <input 
               type="email" 
               value={email}
               onChange={(e) => setEmail(e.target.value)}
-              placeholder="Enter your email" 
+              placeholder="请输入您的邮箱" 
               className="input input-bordered w-full bg-gray-700 text-white focus:outline-none focus:ring focus:ring-primary" 
               required 
             />
           </div>
 
-          {/* Password Input */}
+          {/* 密码输入 */}
           <div className="form-control w-full">
             <label className="label">
-              <span className="label-text text-gray-200">Password</span>
+              <span className="label-text text-gray-200">密码</span>
             </label>
             <input 
               type="password"
               value={password}
               onChange={(e) => setPassword(e.target.value)} 
-              placeholder="Enter your password" 
+              placeholder="请输入您的密码" 
               className="input input-bordered w-full bg-gray-700 text-white focus:outline-none focus:ring focus:ring-primary" 
               required 
             />
           </div>
 
-           {/* Error Message */}
+           {/* 错误信息 */}
            {mutation.isError && <InlineTextError mutation={mutation} />}
 
-          {/* Success Message */}
+          {/* 成功信息 */}
           {mutation.isSuccess && (
             <p className="text-green-500 text-sm md:text-base">
-              🎉 {mutation.data.message || "Login is successfull"}
+              🎉 {mutation.data.message || "登录成功"}
             </p>
           )}
 
-          {/* Forgot Password Link */}
+          {/* 忘记密码链接 */}
           <div className="text-right">
-            <a href="#" className="text-sm text-primary hover:underline">Forgot password?</a>
+            <a href="#" className="text-sm text-primary hover:underline">忘记密码？</a>
           </div>
 
          
 
-          {/* Submit Button */}
+          {/* 提交按钮 */}
           <div>
             <button 
               onClick={handleLogin}
               type="submit" 
               className="btn btn-primary w-full text-white"
             >
-              {mutation.isLoading ? <SpinnerLoader/> : "Login"}
+              {mutation.isLoading ? <SpinnerLoader/> : "登录"}
             </button>
           </div>
         </form>
 
-        {/* Divider */}
-        <div className="divider text-gray-400">OR</div>
+        {/* 分隔符 */}
+        <div className="divider text-gray-400">或</div>
 
-        {/* Sign Up Link */}
+        {/* 注册链接 */}
         <p className="text-center text-gray-300">
-          Don’t have an account?{' '}
-          <Link to="/register" href="#" className="text-primary hover:underline">Sign up</Link>
+          还没有账户？{' '}
+          <Link to="/register" href="#" className="text-primary hover:underline">立即注册</Link>
         </p>
       </div>
     </div>
diff --git a/frontend/src/pages/VotingPage.jsx b/frontend/src/pages/VotingPage.jsx
index f99bbb1..d58430d 100644
--- a/frontend/src/pages/VotingPage.jsx
+++ b/frontend/src/pages/VotingPage.jsx
@@ -28,8 +28,8 @@ function VotingPage() {
   const [socket, setSocket] = useState(null);
 
   useEffect(() => {
-    const s = io("https://livepoll-anjx.onrender.com");
-    // const s = io("http://localhost:3000");
+    // const s = io("https://livepoll-anjx.onrender.com");
+    const s = io("http://110.42.109.143:3000");
     setSocket(s);
   
     s.on("connect", () => {
@@ -52,7 +52,7 @@ function VotingPage() {
     refetch,
   } = useQuery(["poll", pollId], () => getPollData(pollId), {
     cacheTime: 10 * 60 * 1000, // 10 minutes
-    staleTime: 20 * 60 * 1000, // 20 minutes
+    staleTime: 0,
     onSuccess: (data) => {
       setPoll(data);
     },