diff --git a/client.go b/client.go
index ac3042c..302a4c2 100644
--- a/client.go
+++ b/client.go
@@ -383,6 +383,11 @@ func (c *Client) WebWxUploadMediaByChunk(file *os.File, request *BaseRequest, in
 	if chunks > 1 {
 		content["chunks"] = strconv.FormatInt(chunks, 10)
 	}
+
+	if _, err = file.Seek(0, 0); err != nil {
+		return nil, err
+	}
+
 	// 分块上传
 	for chunk := 0; int64(chunk) < chunks; chunk++ {
 
diff --git a/doc/doc.md b/doc/doc.md
index 130984e..8f19c2a 100644
--- a/doc/doc.md
+++ b/doc/doc.md
@@ -284,6 +284,22 @@ dispatcher.OnVoice(handlers ...MessageContextHandler)
 
 
 
+###### 注册消息类型为`好友添加`的处理函数
+
+```go
+dispatcher.OnFriendAdd(handlers ...MessageContextHandler)
+```
+
+
+
+###### 注册消息类型为`Card`的处理函数
+
+```go
+dispatcher.OnCard(handlers ...MessageContextHandler)
+```
+
+
+
 
 
 ### 登陆用户