The data should be filled in as follows:

1. Credit card validity period: The credit card validity period is usually located on the front of the credit card, in the format of "month/year", for example, "08/25" means 2025 Expires in August. When filling in, you need to fill in the validity period completely, including month and year.

2. Credit card security code: The credit card security code is the three-digit number on the back of the credit card, which is used to confirm the identity of the credit card and transaction security. When filling in, the security code needs to be filled in correctly to ensure transaction security.