The card number and expiration date are engraved on the front of the card. If the expiration date is 05/20, it means it will expire in May 2020. Just enter 0520 on the web page. The CVV2/CVC code is the three digits to the right of the signature on the back of the card.

If the card is still there, just look. If the card is gone, or the number is spent or worn out, there is no way to see it. You can only call the customer service phone of CCB to find a new card manually.