If it is a CMB credit card issued by the Shanghai Credit Card Center, you can fill in the name of any branch of CMB as the opening bank.
If there is a China Merchants Bank in the transfer place, you can write the name of the local branch (for example, if you transfer money to a credit card from Beijing, you can write: China Merchants Bank Beijing Branch Sales Department as the opening bank of the credit card).
If you are remitting credit card money from a place where there is no China Merchants Bank, you can write "China Merchants Bank Shanghai Branch Sales Department" or other branch names.
(Response time: April 20, 2019. For the latest business changes, please refer to the official website of China Merchants Bank.)