Didi refueling Guangfa car owner card cashback. Drip refueling is a preferential refueling activity launched by Guangfa Bank, aiming at providing more affordable refueling services for Guangfa car owners. According to the information released by official website of China Guangfa Bank, the holders of Guangfa Owner Card can enjoy the preferential policy of cash back by paying the refueling fee with Guangfa Owner Card on Didi Refueling Platform.