在Mux.Cool中，持续发送需要转发的报文使用以下哪个status的帧

{ "open": [ { "ref_id": "https://github.com/v2ray/manual/raw/master/zh_cn/developer/protocols/muxcool.md", "lineno": 1 } ], "response_length": "long" }

Thought for 22 seconds