16 digits are credit cards, 18 digits are old cards, the new Smart Card is a 19-digit credit card, and the savings card is also 19 digits.
1. Savings card (generally 19 digits): cards with card numbers beginning with 95588, 955881, 955882, 6222, 62222, etc. are smart cards or E-era cards; Cards with card numbers beginning with 955888, 62228 and 621288 are wealth management gold cards or ICBC wealth management gold cards.
2. Credit card (generally 14-16 digits): the card number starts with 3, 4, 5 and 6 (except international debit cards).