1. The Bank of China Great Wall Debit Card is also called a savings card. It is not a credit card and cannot be used for overdraft.

2. Debit card is a payment tool provided by commercial banks that is easy to apply for, has many functions, and can be deposited first and used later. A credit card is a credit payment tool that allows banks to grant cardholders a certain credit limit and allow them to consume first and repay later.