There are no restrictions on external accounts, as long as your account is not a so-called anti-terrorism blacklist account supported by the FBI (which is generally not the case in China). The main restriction is domestic exchange, and each person can only exchange foreign exchange worth $5 per year.

There are no restrictions on Paypai, whether it is a senior account or a personal account, but a considerable amount of formalities will be charged for commercial payment. For domestic commercial payment, the payee's deduction fee is 3.4% * total payment +0.3 USD, and for international commercial payment, the payee's deduction fee is 3.9% * total payment +0.3 USD.