March 23. According to the official website of China Construction Bank, the repayment period of CCB’s business credit card is 20 days after the bill date, and the final repayment date is the 20th day after the bill date, so consumption will be made on March 3 and repayment will be made on March 23. China Construction Bank, formerly the People's Construction Bank of China, was established on October 1, 1954.