--FILE--View of redit cards with the logos of VISA and MasterCard in Jinan city, east Chinas Shandong province, 29 March 2009. Unpaid credit card debt on the Chinese Mainland has surged 126.5 per cent this year, prompting Beijing to warn banks to ease back on aggressive marketing tactics that encourage people to sign up for new cards. By the end of September, 7.43 billion yuan (US$1.09 billion) of credit card debt was at least six months overdue, the Peoples Bank of China said, adding bad-debt problems should be closely watched. The overdue amount represents 3.4 per cent of the total outstanding credit card debt, 0.3 percentage points higher than at the end of the second quarter this year. Mainland banks had issued 175 million credit cards as of September. In the first nine months of the year, spending using credit cards jumped 39.7 per cent from a year ago to 1.24 trillion yuan (US$182 billion).