diff --git a/main/src/client/NapCatClient/client.ts b/main/src/client/NapCatClient/client.ts
index 2f34291..1390b16 100644
--- a/main/src/client/NapCatClient/client.ts
+++ b/main/src/client/NapCatClient/client.ts
@@ -40,12 +40,12 @@ export class NapCatClient extends QQClient {
     });
   }
 
-  private readonly echoMap: { [key: string]: { resolve: (result: any) => void; reject: (result: any) => void } } = {};
+  private readonly echoMap = new Map<string, { resolve: (result: any) => void; reject: (result: any) => void }>();
 
   public async callApi<T extends keyof WSSendReturn>(action: T, params?: WSSendParam[T]): Promise<WSSendReturn[T]> {
     return new Promise<WSSendReturn[T]>((resolve, reject) => {
       const echo = `${new Date().getTime()}${random.int(100000, 999999)}`;
-      this.echoMap[echo] = { resolve, reject };
+      this.echoMap.set(echo, { resolve, reject });
       this.ws.send(JSON.stringify({ action, params, echo }));
       this.logger.debug('send', JSON.stringify({ action, params, echo }));
     });
@@ -55,8 +55,9 @@ export class NapCatClient extends QQClient {
     this.logger.debug('receive', message);
     const data = JSON.parse(message) as WSReceiveHandler[keyof WSReceiveHandler] & { echo: string; status: 'ok' | 'error'; data: any; message: string };
     if (data.echo) {
-      const promise = this.echoMap[data.echo];
+      const promise = this.echoMap.get(data.echo);
       if (!promise) return;
+      this.echoMap.delete(data.echo);
       if (data.status === 'ok') {
         promise.resolve(data.data);
       }
diff --git a/main/src/client/NapCatClient/convert.ts b/main/src/client/NapCatClient/convert.ts
index 3104961..41b7386 100644
--- a/main/src/client/NapCatClient/convert.ts
+++ b/main/src/client/NapCatClient/convert.ts
@@ -62,7 +62,7 @@ export const messageElemToNapCatSendable = async (elem: SendableElem): Promise<{
           type: elem.type,
           data: {
             file: elem.file,
-            summary: elem.type,
+            summary: 'Q2TG ' + elem.type,
             name: elem.type,
           },
         } as any,