diff --git a/src/app/json-formatter/page.tsx b/src/app/json-formatter/page.tsx
deleted file mode 100644
index a328542..0000000
--- a/src/app/json-formatter/page.tsx
+++ /dev/null
@@ -1,76 +0,0 @@
-"use client";
-
-import { Button } from "@/components/ui/button";
-import { Textarea } from "@/components/ui/textarea";
-import { useState } from "react";
-import Link from "next/link";
-
-export default function JsonFormatterPage() {
-  const [input, setInput] = useState("");
-  const [output, setOutput] = useState("");
-  const [error, setError] = useState("");
-
-  const formatJson = () => {
-    try {
-      const formatted = JSON.stringify(JSON.parse(input), null, 2);
-      setOutput(formatted);
-      setError("");
-    } catch (e: any) {
-      setError("Invalid JSON: " + e.message);
-      setOutput("");
-    }
-  };
-
-  const copyToClipboard = () => {
-    navigator.clipboard.writeText(output);
-  };
-
-  const clearText = () => {
-    setInput("");
-    setOutput("");
-    setError("");
-  };
-
-  return (
-    <div className="container mx-auto p-4">
-      <header className="mb-8">
-        <Link href="/" className="text-blue-500 hover:underline">
-          &larr; Back to Home
-        </Link>
-        <h1 className="text-4xl font-bold mt-4">JSON Formatter</h1>
-      </header>
-      <main className="grid md:grid-cols-2 gap-4">
-        <div className="flex flex-col gap-2">
-          <label htmlFor="json-input">Input</label>
-          <Textarea
-            id="json-input"
-            value={input}
-            onChange={(e) => setInput(e.target.value)}
-            placeholder="Paste your JSON here"
-            className="h-96"
-          />
-        </div>
-        <div className="flex flex-col gap-2">
-          <label htmlFor="json-output">Output</label>
-          <Textarea
-            id="json-output"
-            value={output}
-            readOnly
-            placeholder="Formatted JSON will appear here"
-            className="h-96"
-          />
-        </div>
-      </main>
-      <footer className="mt-4 flex gap-2">
-        <Button onClick={formatJson}>Format JSON</Button>
-        <Button onClick={copyToClipboard} disabled={!output}>
-          Copy to Clipboard
-        </Button>
-        <Button onClick={clearText} variant="destructive">
-          Clear
-        </Button>
-      </footer>
-      {error && <p className="text-red-500 mt-4">{error}</p>}
-    </div>
-  );
-}
diff --git a/src/app/rt-guide/board-form.tsx b/src/app/rt-guide/board-form.tsx
index 20c3910..f012605 100644
--- a/src/app/rt-guide/board-form.tsx
+++ b/src/app/rt-guide/board-form.tsx
@@ -18,7 +18,7 @@ import {
 import { Separator } from "@/components/ui/separator";
 import { Switch } from "@/components/ui/switch";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
-import { BoardData, TrainType } from "./types";
+import { BoardData, ThemeInfo,  TrainType } from "./types";
 
 interface BoardFormProps {
     data: BoardData;
@@ -30,22 +30,38 @@ export function BoardForm({ data, setData }: BoardFormProps) {
         setData({ ...data, statusBar: { ...data.statusBar, [field]: value } });
     };
 
-    const handleTrainChange = (index: number, field: string, value: any) => {
+    type TrainField =
+        | "platform"
+        | "arrival"
+        | "type"
+        | "destination.en"
+        | "destination.cn";
+
+    const handleTrainChange = (
+        index: number,
+        field: TrainField,
+        value: string | TrainType
+    ) => {
         const newTrains = [...data.trains];
         const trainToUpdate = { ...newTrains[index] };
 
         if (field === "destination.en" || field === "destination.cn") {
-            const [, subkey] = field.split(".");
-            (trainToUpdate.destination as any)[subkey] = value;
+            const [, subkey] = field.split(".") as ["destination", "en" | "cn"];
+            trainToUpdate.destination[subkey] = value as string;
+        } else if (field === "type") {
+            trainToUpdate[field] = value as TrainType;
         } else {
-            (trainToUpdate as any)[field] = value;
+            trainToUpdate[field as "platform" | "arrival"] = value;
         }
 
         newTrains[index] = trainToUpdate;
         setData({ ...data, trains: newTrains });
     };
 
-    const handleThemeChange = (field: string, value: string) => {
+    const handleThemeChange = (
+        field: keyof Omit<ThemeInfo, "trainTypeColors"> | "trainTypeColors",
+        value: string | Record<TrainType, string>
+    ) => {
         setData({ ...data, theme: { ...data.theme, [field]: value } });
     };
 
@@ -265,11 +281,11 @@ export function BoardForm({ data, setData }: BoardFormProps) {
                                                 type="color"
                                                 value={data.theme.trainTypeColors[type]}
                                                 onChange={(e) => {
-                                                    const newColors = {
+                                                    const newColors: Record<TrainType, string> = {
                                                         ...data.theme.trainTypeColors,
                                                         [type]: e.target.value,
                                                     };
-                                                    handleThemeChange("trainTypeColors", newColors as any);
+                                                    handleThemeChange("trainTypeColors", newColors);
                                                 }}
                                             />
                                         </div>
diff --git a/src/app/rt-guide/display-board.tsx b/src/app/rt-guide/display-board.tsx
deleted file mode 100644
index e69de29..0000000
diff --git a/src/components/rt-guide/mtr-board-form.tsx b/src/components/rt-guide/mtr-board-form.tsx
index 909af70..dd68849 100644
--- a/src/components/rt-guide/mtr-board-form.tsx
+++ b/src/components/rt-guide/mtr-board-form.tsx
@@ -19,7 +19,7 @@ import { ColorPicker } from "@/components/ui/color-picker";
 import { Separator } from "@/components/ui/separator";
 import { Switch } from "@/components/ui/switch";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
-import { BoardData, TrainType } from "@/app/rt-guide/types";
+import { BoardData, ThemeInfo, TrainType } from "@/app/rt-guide/types";
 
 interface MtrBoardFormProps {
   data: BoardData;
@@ -31,22 +31,38 @@ export function MtrBoardForm({ data, setData }: MtrBoardFormProps) {
     setData({ ...data, statusBar: { ...data.statusBar, [field]: value } });
   };
 
-  const handleTrainChange = (index: number, field: string, value: any) => {
+  type TrainField =
+    | "platform"
+    | "arrival"
+    | "type"
+    | "destination.en"
+    | "destination.cn";
+
+  const handleTrainChange = (
+    index: number,
+    field: TrainField,
+    value: string | TrainType
+  ) => {
     const newTrains = [...data.trains];
     const trainToUpdate = { ...newTrains[index] };
 
     if (field === "destination.en" || field === "destination.cn") {
-      const [, subkey] = field.split(".");
-      (trainToUpdate.destination as any)[subkey] = value;
+      const [, subkey] = field.split(".") as ["destination", "en" | "cn"];
+      trainToUpdate.destination[subkey] = value as string;
+    } else if (field === "type") {
+      trainToUpdate[field] = value as TrainType;
     } else {
-      (trainToUpdate as any)[field] = value;
+      trainToUpdate[field as "platform" | "arrival"] = value;
     }
 
     newTrains[index] = trainToUpdate;
     setData({ ...data, trains: newTrains });
   };
 
-  const handleThemeChange = (field: string, value: any) => {
+  const handleThemeChange = (
+    field: keyof Omit<ThemeInfo, "trainTypeColors"> | "trainTypeColors",
+    value: string | Record<TrainType, string>
+  ) => {
     setData({ ...data, theme: { ...data.theme, [field]: value } });
   };
 
@@ -250,10 +266,10 @@ export function MtrBoardForm({ data, setData }: MtrBoardFormProps) {
                   (type) => (
                     <ColorPicker
                       key={type}
-                      label={type === "local" ? "普通" : 
-                             type === "express" ? "特快" :
-                             type === "rapid" ? "快速" :
-                             type === "through" ? "直通" : type}
+                      label={type === "local" ? "普通" :
+                        type === "express" ? "直快" :
+                          type === "rapid" ? "快速" :
+                            type === "through" ? "贯通" : type}
                       value={data.theme.trainTypeColors[type]}
                       onChange={(value) => {
                         const newColors = {
diff --git a/src/lib/tools.ts b/src/lib/tools.ts
index afb0efb..a7ec261 100644
--- a/src/lib/tools.ts
+++ b/src/lib/tools.ts
@@ -9,15 +9,5 @@ export const tools: Tool[] = [
     title: "Rail Transit Guide",
     description: "轨道交通导视生成器",
     href: "/rt-guide",
-  },
-  {
-    title: "URL Encoder/Decoder",
-    description: "Encode or decode URLs and strings.",
-    href: "/url-encoder",
-  },
-  {
-    title: "Base64 Encoder/Decoder",
-    description: "Encode or decode strings to and from Base64.",
-    href: "/base64-encoder",
-  },
+  }
 ];