diff --git a/app/command.ts b/app/command.ts
index e515e5f0bb4..bea4e06f381 100644
--- a/app/command.ts
+++ b/app/command.ts
@@ -41,13 +41,16 @@ interface ChatCommands {
   del?: Command;
 }
 
-export const ChatCommandPrefix = ":";
+// Compatible with Chinese colon character "："
+export const ChatCommandPrefix = /^[:：]/;
 
 export function useChatCommand(commands: ChatCommands = {}) {
   function extract(userInput: string) {
-    return (
-      userInput.startsWith(ChatCommandPrefix) ? userInput.slice(1) : userInput
-    ) as keyof ChatCommands;
+    const match = userInput.match(ChatCommandPrefix);
+    if (match) {
+      return userInput.slice(1) as keyof ChatCommands;
+    }
+    return userInput as keyof ChatCommands;
   }
 
   function search(userInput: string) {
@@ -57,7 +60,7 @@ export function useChatCommand(commands: ChatCommands = {}) {
       .filter((c) => c.startsWith(input))
       .map((c) => ({
         title: desc[c as keyof ChatCommands],
-        content: ChatCommandPrefix + c,
+        content: ":" + c,
       }));
   }
 
diff --git a/app/components/chat.tsx b/app/components/chat.tsx
index bb4b611ad79..785b1f7cd9c 100644
--- a/app/components/chat.tsx
+++ b/app/components/chat.tsx
@@ -811,7 +811,7 @@ function _Chat() {
     // clear search results
     if (n === 0) {
       setPromptHints([]);
-    } else if (text.startsWith(ChatCommandPrefix)) {
+    } else if (text.match(ChatCommandPrefix)) {
       setPromptHints(chatCommands.search(text));
     } else if (!config.disablePromptHint && n < SEARCH_TEXT_LIMIT) {
       // check if need to trigger auto completion