According to the explanation of the central bank, the Class I account in the personal settlement account is an account opened by the current individual at the bank counter and verified on the spot, with complete functions; Class II and III households are bank accounts opened through electronic channels such as bank counters or the Internet, which have limited functions and need to be bound with Class I households.
Extended data:
Free business of Bank of Communications (partial screenshot):
References:
Bank of Communications-General Information-Service Charge List