Your questions about SoFi Hong Kong are answered here

That’s easy! Simply log in, press ‘$’ at the bottom of the main screen -> click ‘manage bank accounts’ -> ‘add bank accounts’, input bank account details and upload. (It should show your full name and account number). Please be reminded that you will also need to make a deposit of HK$10,000 from the newly added bank account to activate it, if your account is opened with an e-signature.