diff --git a/woa/init.py b/woa/init.py
index e9fd770..7277485 100644
--- a/woa/init.py
+++ b/woa/init.py
@@ -144,7 +144,7 @@ class WOAHandler:
 			rzt_dic.media_id = await self.media_manager.upload_media(rzt_dic.msgtype, rzt_dic.media_filepath)
 		return rzt_dic
 
-	def build_reply(self, msg:DictObject, rzt_msg:DictObject):
+	async def build_reply(self, msg:DictObject, rzt_msg:DictObject):
 		"""
 		ImageReply, VoiceReply, VideoReply,
 		ArticlesReply, MusicReply
@@ -153,17 +153,17 @@ class WOAHandler:
 			reply = ReplyBuilder.text(msg, content=rzt_msg.content)
 			return reply
 		if rzt_msg.msgtype in ['image', 'video', 'voice']:
-			media_id = await self.upload_media(rzt_msg.msgtype, 
+			rzt_msg.media_id = await self.upload_media(rzt_msg.msgtype, 
 					rzt_msg.media_file)
 		if rzt_msg.msgtype == 'image':
-			reply = ReplyBuilder.image(msg, media_id=media_id)
+			reply = ReplyBuilder.image(msg, media_id=rzt_msg.media_id)
 			return reply
 		if rzt_msg.msgtype == 'voice':
-			reply = ReplyBuilder.voice(msg, media_id=media_id)
+			reply = ReplyBuilder.voice(msg, media_id=rzt_msg.media_id)
 			return reply
 		if rzt_msg.msgtype == 'video':
 			reply = ReplyBuilder.video(msg, title=rzt_msg.title,
-					media_id=media_id,
+					media_id=rzt_msg.media_id,
 					description=rzt_msg.description)
 			return reply
 		if rzt_msg.msgtype == 'music':
@@ -215,7 +215,7 @@ class WOAHandler:
 
 			# --- 业务逻辑 ---
 			reply_dic = await self.msghandle(msg_dict)
-			reply_xml = self.build_reply(msg_dict, reply_dic)
+			reply_xml = await self.build_reply(msg_dict, reply_dic)
 
 			# 5. 如果需要加密回复
 			if self.encoding_aes_key and reply_xml: