How did China Construction Bank deduct it twice, once in 2 yuan and once in 1.8 yuan?

The service charge for the two cards in your name. Because there are two CCB cards with short messages, one of them will deduct money from the other card if the balance is insufficient. The full name of CCB is China Construction Bank Co., Ltd., which is a large state-owned bank managed by the central government. From the feedback of users, CCB's products and staff's service attitude are very good.