The card organization corresponding to the position number is as follows:

1 and "62" begin with China unionpay, and the card number is 16.

2.VISA starts with "4" and the card number is 16.

3. MasterCard starts with "5" and the card number is 16 digits.

4. Japanese JCB begins with "35" and the card number is 16.

5. American Express begins with "34/37". Card number 15 digits.

6. "30/36" began with the Dalai Lama. Card number 15 digits.