When I set Associate Domains in Xcode, I use this format applinks:***.***.com.cn:9090 , Is that a problem ?
can I use the port like 9090
No. The docs are pretty clear about the format of that string and that format does not include a port number.
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"