3 issues 2.7, 6 issues 4.5, 12 issues 7.92. According to the official website of China Merchants Bank, we learned that the annual interest rates of China Merchants Bank credit cards vary according to different installments, specifically: 2.7 for 3 installments, 4.5 for 6 installments, and 7.92 for 12 installments. China Merchants Bank, established in Shekou, Shenzhen in 1987, is the first joint-stock commercial bank in China that is entirely owned by corporate legal persons.