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How to tell which region issued the card from the credit card number of Bank of Communications?
the city code is the 7th to 9th digits in the Pacific Kaka number, and its coding rules are as follows:

×××

└ ┘ ─

AB

A: 1 ~ 3 (if it is not enough, it will be increased by 3 on the basis of the original number) as the codes of the directly affiliated bank and the jurisdiction bank;

b: 1 ~ 9 are the sequence numbers of branches and sub-branches within the jurisdiction.

code │ line name │ code │ line name │ code │ line name │

├ ┼ ┼ ┼ ┼ ┼ ┼— ┼┼┼┼┤

│ 11 │ Shanghai Branch │32 │ Jingdezhen Branch │53 │ Chengdu Branch │77 │ Guilin Branch │

┼ │ │ │ │ │ 9 ┼┼┼┼┼┼┼┼┼┼┼┼┼┼┤

│ 13 │ Changzhou Branch. Yuan branch │ │ │

├ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼— │35 │ Jilin Branch │58 │ Guiyang Branch │82 │ Lanzhou Branch │ < P > ├ ┼ ┼ ┼ ┼ ┼ ┼ ┼— ┼┤

│ 18 │ Ningbo Branch │37 │ Daqing Branch │61 │ Wuhan Branch │92 │ Shijiazhuang Branch │ │ │ │ │ │ │ │ │ │ 9474 Siping branch │62 │ Zhengzhou branch │93 │ Tangshan branch │

├ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼— ┤

│21 │ Nanjing Branch │33 │ Tonghua Branch │64 │ Changsha Branch │12 │ Taiyuan Branch │

├ ┼ ┼ ┼ ┼ │ │ │ │— ┼┼┼┼┼┼┼┤

│ 23 │ Xuzhou Branch │42 │ Qinhuangdao Branch │66 │ Xinyu Branch │41 │ Jinan Branch │

. Fang branch │

├ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┤ ┼ ┼. Branch │73 │ Shantou Branch │111 │ Hainan Branch │

├ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼ ┼—