Because the foreign exchange business of China Bank is better, there are more overseas institutions, and there are more foreign banks that have business dealings with China Bank. If you remit money from abroad, you don't need to transfer it from an intermediate bank, which saves time and has few intermediate links.

If you want to open an account, I suggest you just open a current all-in-one account and bring your ID card. Just tell the remitter the account number and the swift code (ask BOC for it, the swift code of each BOC is different).