Longka dual-currency credit card (hereinafter referred to as "dual-currency credit card") is a series of Longka products issued by China Construction Bank (hereinafter referred to as "issuing bank"). It is a credit payment tool issued by the issuing bank to the public, and the cardholder can use the money first and then repay it within the credit limit approved by the issuing bank. It can be used in China (excluding Hong Kong, Macao and Taiwan, the same below) and overseas (including Hong Kong, Macao and Taiwan, the same below), and settled in RMB and designated foreign exchange respectively.