Originally Posted by
STS-134
Not in your case.
While what you ask for is potentially possible, the problem is it does not seem you are a Hong Kong resident. All postpaid plans require a local proof of address, as well as a HKID. Based on your FT profile, it does not seem you have either.
(Note - FWIW - the U.S. has a similar logic that it is a big trouble when you want postpaid service without SSN.)
The easiest way - without the dual number SIM - is to get an actual Chinese SIM. They are available, at least in the Mainland. The problem is if you can communicate with them.