1. official website inquiry: You can log in to official website, China Petrochemical Company, enter the "China petrochemical refueling card" page, select "Inquire about the balance in the card", enter relevant information and inquire about the validity period of the card.
2. Customer service telephone inquiry: You can call the customer service telephone of Sinopec, select the corresponding inquiry service after the voice prompt, and inquire the validity period of the card according to the prompt.
3. Go to the store for consultation: You can carry the fuel card with you and directly consult the staff at the Sinopec gas station, who will help you check the validity period of the card.