I've emailed wangziqi352442220@126.com several times, this email seems to still work as it's not rejected, the older email addresses get return messages that they no longer work, but wangziqi352442220@126.com seems to send ok, just no response, have sent several messages & encourage others to hopefully also do so.
If you or anyone knows of any other contact information that works, for $KWBT please post it. thanks :-)