diff --git a/wecom-api.js b/wecom-api.js
index 029f7e9..ebdee94 100755
--- a/wecom-api.js
+++ b/wecom-api.js
@@ -37,6 +37,7 @@
   async uploadMedia(corpId, corpSecret, type, filePath, fileName) {
     const { readFile } = await import("fs/promises");
     const { Buffer } = await import("buffer");
+    const path = await import("path");
     
     logger.debug("WeCom API: Uploading media", { corpId, type, filePath });
     const token = await this.getAccessToken(corpId, corpSecret);
@@ -44,7 +45,9 @@
     const fileBuffer = await readFile(filePath);
     const formData = new FormData();
     const blob = new Blob([fileBuffer]);
-    formData.append('media', blob, fileName || 'file');
+    
+    const actualFileName = fileName || path.basename(filePath) || 'file.mp3';
+    formData.append('media', blob, actualFileName);
 
     const res = await fetch(`https://qyapi.weixin.qq.com/cgi-bin/media/upload?access_token=${token}&type=${type}`, {
       method: "POST",
diff --git a/wecom-message-processor.js b/wecom-message-processor.js
index 1a730ae..f8b73ad 100755
--- a/wecom-message-processor.js
+++ b/wecom-message-processor.js
@@ -538,10 +538,28 @@
 
             for (const media of mediaMatches) {
                const type = getWecomMediaType(media.path);
-               processedText = processedText.replace(media.fullMatch, `[${type === 'voice' ? '语音' : type === 'video' ? '视频' : type === 'image' ? '图片' : '文件'}: ${media.path}]`).trim();
+               try {
+                  const uploadRes = await wecomApi.uploadMedia(account.corpId, account.corpSecret, type, media.path);
+                  const mediaId = uploadRes.media_id;
+                  const agentId = message.agentId || account.agentId || 1000002;
+                  if (type === 'image') {
+                    await wecomApi.sendImageMessage?.(account.corpId, account.corpSecret, agentId, senderId, mediaId);
+                  } else if (type === 'voice') {
+                    await wecomApi.sendVoiceMessage?.(account.corpId, account.corpSecret, agentId, senderId, mediaId);
+                  } else if (type === 'video') {
+                    await wecomApi.sendVideoMessage?.(account.corpId, account.corpSecret, agentId, senderId, mediaId);
+                  } else {
+                    await wecomApi.sendFileMessage?.(account.corpId, account.corpSecret, agentId, senderId, mediaId);
+                  }
+                  logger.info("WeCom Self-Built (Async): sent active media message (mixed with text)", { mediaId, type });
+                  processedText = processedText.replace(media.fullMatch, "").trim();
+               } catch (err) {
+                  logger.error("WeCom Self-Built (Async): Failed to upload/send media actively", { error: err.message, path: media.path });
+                  processedText = processedText.replace(media.fullMatch, `[${type === 'voice' ? '语音' : type === 'video' ? '视频' : type === 'image' ? '图片' : '文件'}: ${media.path}]`).trim();
+               }
             }
             
-            if (processedText.trim() || mediaMatches.length > 0) {
+            if (processedText.trim()) {
               try {
                 await wecomApi.sendTextMessage(account.corpId, account.corpSecret, message.agentId || account.agentId || 1000002, senderId, processedText);
               } catch (e) {
@@ -766,8 +784,27 @@
           }
       } else if (isSelfBuiltAppRequest) {
           const type = getWecomMediaType(media.path);
-          processedText = processedText.replace(media.fullMatch, `[${type === 'voice' ? '语音' : type === 'video' ? '视频' : type === 'image' ? '图片' : '文件'}: ${media.path}]`).trim();
-          logger.warn("WeCom Self-Built: converting local media to text for passive reply (multi-item or text mixed)", { mediaPath: media.path, type });
+          try {
+            const uploadRes = await wecomApi.uploadMedia(account.corpId, account.corpSecret, type, media.path);
+            const mediaId = uploadRes.media_id;
+            const toUser = originalMessage.fromUser || originalMessage.chatId || originalMessage.ToUserName;
+            const agentId = originalMessage.agentId || account.agentId || 1000002;
+            
+            if (type === 'image') {
+              await wecomApi.sendImageMessage?.(account.corpId, account.corpSecret, agentId, toUser, mediaId);
+            } else if (type === 'voice') {
+              await wecomApi.sendVoiceMessage?.(account.corpId, account.corpSecret, agentId, toUser, mediaId);
+            } else if (type === 'video') {
+              await wecomApi.sendVideoMessage?.(account.corpId, account.corpSecret, agentId, toUser, mediaId);
+            } else {
+              await wecomApi.sendFileMessage?.(account.corpId, account.corpSecret, agentId, toUser, mediaId);
+            }
+            logger.info("WeCom Self-Built: sent active media message (mixed with text)", { mediaId, type });
+            processedText = processedText.replace(media.fullMatch, "").trim();
+          } catch (err) {
+            logger.error("Failed to upload/send media actively", { error: err.message, path: media.path });
+            processedText = processedText.replace(media.fullMatch, `[${type === 'voice' ? '语音' : type === 'video' ? '视频' : type === 'image' ? '图片' : '文件'}: ${media.path}]`).trim();
+          }
       }
     }
   }