"622188" "955100" "622150". According to the query on Xicai.com, Postal Savings Bank card numbers start with "622188", "955100", and "622150", and credit cards generally start with "6228 (regular card), 6269 (gold card), 6259 (co-branded card)", etc. beginning. The types and levels of cards are different, and the card numbers at the beginning are also different.