The first three digits represent the acquiring bank. This code is consistent with the account-opening bank code in the personal credit report. The corresponding relationship between the account-opening bank codes is as follows:
102: Industrial and Commercial Bank of China
103: Agricultural Bank of China
104: Bank of China
105: China Construction Bank
301: Bank of Communications
302: CITIC Industrial Bank
303: China Everbright Bank
304: Huaxia Bank
305: China Minsheng Bank
306: Guangdong Development Bank
307: Shenzhen Development Bank
308: China Merchants Bank
309: Industrial Bank
310: Shanghai Pudong Development Bank
100: Postal Savings Bank
001 means the acquiring bank is China UnionPay
For example: 310 4401 4814 0001
310 means Shanghai Pudong Development Bank POS acquiring order, 4401=Guangzhou City, Guangdong, 4814=Telecom Services