The mobile banking of China Construction Bank is bound to the social security card, and then only the social security card can be selected for each mobile phone transfer. What is originality?

Since the social security card has been selected as the preferred payment account, you can open the mobile banking APP of CCB, enter "Account Management"-"Preferred Account" and set the preferred account.

Preferred account means that mobile banking is not only bound with a CCB card, but also the first account selected by users when transferring money. For example, if someone transfers money to their mobile phone number through CCB Mobile Banking, which card to transfer to first is the preferred account.