diff --git a/libs/db.js b/libs/db.js
index 4f9d0c4..8aea6e7 100644
--- a/libs/db.js
+++ b/libs/db.js
@@ -41,10 +41,10 @@ const updateUsernameWithLimit = db.transaction((username, id, limit) => {
   const count = countUser.get(username).count;
   const existingUsername = getUsername.get(id).username;
   if (existingUsername !== "") {
-    throw new Error("Username already exists");
+    throw new Error("这个时间段已经有人了喔");
   }
   if (count >= limit) {
-    throw new Error("Limit reached");
+    throw new Error("达到数量上限啦");
   }
   updateUsername.run(username, id);
 });
diff --git a/pages/_app.js b/pages/_app.js
index 4845572..7890410 100644
--- a/pages/_app.js
+++ b/pages/_app.js
@@ -39,7 +39,7 @@ function MyApp({ Component, pageProps }) {
           }}
         >
           <Typography variant="h5">
-            <Link href="/">ITSC Tool</Link>
+            <Link href="/">抢 班</Link>
           </Typography>
           {username && (
             <Button
@@ -50,7 +50,7 @@ function MyApp({ Component, pageProps }) {
                 setUsername("");
               }}
             >
-              {username} (Logout)
+              {username} (点击登出)
             </Button>
           )}
         </Toolbar>
diff --git a/pages/api/time/limit.js b/pages/api/time/limit.js
index ba70ee0..e9465eb 100644
--- a/pages/api/time/limit.js
+++ b/pages/api/time/limit.js
@@ -8,7 +8,7 @@ export default function handler(req, res) {
     // authenticate
     if (!authenticate(token)) {
       res.status(401).json({
-        error: "Unauthorized",
+        error: `token ${token} 验证失败`,
       });
       return;
     }
@@ -17,7 +17,7 @@ export default function handler(req, res) {
     const limitInt = parseInt(limit);
     if (!limitInt) {
       res.status(400).json({
-        error: "limit must be integer",
+        error: `数量限制必须是整数，但是传入了 ${limit}`,
       });
       return;
     }
@@ -25,6 +25,6 @@ export default function handler(req, res) {
     setLimit(limitInt);
     res.status(200).send({ success: true });
   } else {
-    res.status(405).send({ error: "method not allowed" });
+    res.status(405).send({ error: "方法" + req.method + "不被允许" });
   }
 }
diff --git a/pages/api/time/ranges.js b/pages/api/time/ranges.js
index 4f9fb07..158bc8a 100644
--- a/pages/api/time/ranges.js
+++ b/pages/api/time/ranges.js
@@ -10,7 +10,9 @@ export default function handler(req, res) {
     // authenticate
     const { token } = req.body;
     if (!authenticate(token)) {
-      res.status(401).json({ error: "Unauthorized" });
+      res.status(401).json({
+        error: `token ${token} 验证失败`,
+      });
       return;
     }
     // jsonfiy
@@ -21,9 +23,6 @@ export default function handler(req, res) {
     });
     return;
   } else {
-    // 500 error
-    res.status(500).json({
-      error: "Method not allowed",
-    });
+    res.status(405).send({ error: "方法" + req.method + "不被允许" });
   }
 }
diff --git a/pages/api/time/ranges/[id].js b/pages/api/time/ranges/[id].js
index 35fa19e..139b9f4 100644
--- a/pages/api/time/ranges/[id].js
+++ b/pages/api/time/ranges/[id].js
@@ -1,11 +1,16 @@
-import { deleteTimeRange, getLimit, authenticate, updateUsernameWithLimit } from "../../../../libs/db";
+import {
+  deleteTimeRange,
+  getLimit,
+  authenticate,
+  updateUsernameWithLimit,
+} from "../../../../libs/db";
 
 export default function handler(req, res) {
   // check if id is valid
   const { id } = req.query;
   if (id === undefined) {
     res.status(400).json({
-      error: "Missing id",
+      error: `缺少参数 id`,
     });
     return;
   }
@@ -17,7 +22,7 @@ export default function handler(req, res) {
     if (!authenticate(token)) {
       console.log("[DELETE] Authentication failed");
       res.status(401).json({
-        error: "Unauthenticated",
+        error: `token ${token} 验证失败`,
       });
       return;
     }
@@ -30,7 +35,7 @@ export default function handler(req, res) {
     const { username } = req.body;
     if (username === undefined) {
       res.status(400).json({
-        error: "Missing username",
+        error: `缺少参数 username`,
       });
       return;
     }
@@ -44,13 +49,10 @@ export default function handler(req, res) {
       });
       return;
     }
-  
-  // not allow
+
+    // not allow
   } else {
-    // 500 error
-    res.status(500).json({
-      error: "Method not allowed",
-    });
+    res.status(405).send({ error: "方法" + req.method + "不被允许" });
   }
 
   res.status(200).json({
diff --git a/pages/index.js b/pages/index.js
index c32788f..5165f9e 100644
--- a/pages/index.js
+++ b/pages/index.js
@@ -46,7 +46,7 @@ export default function Index(props) {
     <Container>
       <Stack direction="row" spacing={2}>
         <TextField
-          label="Username"
+          label="您的大名？"
           value={username}
           onChange={(e) => setUsername(e.target.value)}
           onKeyUp={(e) => {
@@ -64,7 +64,7 @@ export default function Index(props) {
               login();
             }}
           >
-            Login
+            登入
           </Button>
         </Link>
       </Stack>
@@ -74,7 +74,7 @@ export default function Index(props) {
         onClose={() => setSnackbarOpen(false)}
       >
         <Alert variant="filled" severity="error">
-          Username can{"'"}t be empty
+          请输入您的大名
         </Alert>
       </Snackbar>
     </Container>
diff --git a/pages/time.js b/pages/time.js
index ed67979..1281fc1 100644
--- a/pages/time.js
+++ b/pages/time.js
@@ -172,12 +172,12 @@ export default function Time(props) {
               }}
             >
               <TextField
-                label="Name"
+                label="名称"
                 value={newName}
                 onChange={(e) => setNewName(e.target.value)}
               />
               <TextField
-                label="Range"
+                label="时间段"
                 value={range}
                 onChange={(e) => setRange(e.target.value)}
                 placeholder="2022-01-01 00:00:00"
@@ -188,7 +188,7 @@ export default function Time(props) {
               color="primary"
               onClick={() => addRange()}
             >
-              Add
+              添加
             </Button>
             <Box
               sx={{
@@ -196,7 +196,7 @@ export default function Time(props) {
               }}
             >
               <TextField
-                label="Limit"
+                label="每人数量上限"
                 value={limit}
                 onChange={(e) => setLimit(e.target.value)}
               />
@@ -207,7 +207,7 @@ export default function Time(props) {
                   updateLimit(limit);
                 }}
               >
-                Update Limit
+                修改上限
               </Button>
             </Box>
           </Box>
@@ -224,10 +224,10 @@ export default function Time(props) {
         <Table>
           <TableHead>
             <TableRow>
-              <TableCell>Name</TableCell>
-              <TableCell>Range</TableCell>
-              <TableCell>Taken</TableCell>
-              <TableCell>Action</TableCell>
+              <TableCell>名称</TableCell>
+              <TableCell>时间段</TableCell>
+              <TableCell>姓名</TableCell>
+              <TableCell>操作</TableCell>
             </TableRow>
           </TableHead>
           <TableBody>
@@ -246,7 +246,7 @@ export default function Time(props) {
                     color="primary"
                     onClick={() => updateUsername(range.id, props.username)}
                   >
-                    Take
+                    抢！
                   </Button>
                   {isAdmin() && (
                     <Button
@@ -257,7 +257,7 @@ export default function Time(props) {
                       color="secondary"
                       onClick={() => deleteRange(range.id)}
                     >
-                      Delete
+                      删除
                     </Button>
                   )}
                 </TableCell>
@@ -289,7 +289,7 @@ export default function Time(props) {
           onClose={() => setSnackbarSuccess(false)}
           severity="success"
         >
-          Success!
+          操作成功！
         </Alert>
       </Snackbar>
     </Container>