What is the latest development of CHoIP (connect home over IP)?

At present, Tuya Smart has joined the CHoIP working group and is paying close attention to the progress of the CHoIP. Currently, the CHoIP is only a protocol type jointly released by Apple, Amazon, and Zigbee Alliance. The specific SPEC and supported protocols have not yet been released. The goal of the working group is to release a draft specification and preliminary reference open source implementation by the end of 2020.