Vice-Minister of Commerce Ma Xiuhong yesterday rejected claims by a US congressional commission that China engaged in 'unfair and mercantilist trade practices' that hurt the US economy. 'China's development is also the US' development. So it isn't fair to say China's development is detrimental to the US,' said Ms Ma. 'This report only represents the view of certain US Congress members. It has no substance or real meaning.' The US-China Economic and Security Review Commission said in its annual report that trade with the mainland might benefit US consumers but was costing American manufacturing jobs. The trade imbalance between China and the United States has been a thorny issue in bilateral talks, with Washington complaining that mainland manufacturers take advantage of the undervaluation of the yuan to boost their exports to the US. Speaking after a garment-trade exhibition in New York on Tuesday, Chinese ambassador Yang Jiechi defended China's trade surplus with the US. He said part of the problem was differences between the two countries in tallying trade figures. The US and China disagree on the size of the trade surplus. Richard D'Amato, the US commission's vice-chairman, said the trade deficit gave the US leverage to exert pressure on China. 'We've got to hold China's feet to the fire more. So far, they're very good at singing our song. But they've got to do the dance too.'