You can log in to the mobile banking of Bank of China and inquire through the function of "Home-Credit Card-Annual Fee/Card Information", or inquire the complete credit card number of Bank of China through the counter of Bank of China.
The above contents are for your reference. Please refer to the actual business regulations.
If in doubt, please consult the online customer service of China Bank or download and use the mobile banking APP of China Bank to handle related business.