How does Shenzhen Social Security deduct the money from another card?

There is a binding card number. Shenzhen social security individual contributions are uniformly bound to bank cards, which are automatically withheld every year. Shenzhen Social Security deducted the money from another card, indicating that there is a bound card number, so you can go to the bank to inquire. Shenzhen, referred to as Pengcheng for short, is a sub-provincial city, a city under separate state planning, a megacity in Guangdong Province, a China Special Economic Zone approved by the State Council, a national economic center city and an international city.