ICBC's highest cashback refers to a service related to credit cards. Usually, customers who hold ICBC credit cards can choose to use credit cards to pay for shopping, and choose to apply for cashback service at the same time. Cash-back service allows customers to return a certain percentage of their consumption amount to their credit card accounts after payment is completed. Maximum cashback means the upper limit of the maximum cashback amount that customers can get for each consumption. The specific maximum cash withdrawal amount depends on different credit card products and related policies. Please consult the official website of ICBC or the bank staff for details.