You can apply for activation within the validity period of your credit card. After the validity period, the card will automatically become invalid.
The validity periods of Ping An Bank credit cards are currently 3 years, 5 years, 8 years, and 10 years. Cardholders can check the validity period under the credit card number, which is displayed in the format of "month/year". For example, 10/19 means that the card is valid in October 2019.