China’s car market may experience slower growth this year, a senior government official warned just a day ahead of the Shanghai auto show, the Wall Street Journal reported. “We haven’t seen overcapacity in China’s auto market in the past few years, but if automakers keep output growth as the current pace, China’s auto market will see overcapacity sooner or later,” said Su Bo, deputy industry and technology minister. China, which surpassed the US as the world’s largest car market in 2009, recorded 8.8% year-on-year car sales growth in the first quarter of 2011. In preparation for the Shanghai auto show, major automakers announced a raft of new targets. General Motors (GM.NYSE) aims to double its car sales in China to 5 million units by 2015, up from 2.35 million units sold in 2010. Meanwhile, SAIC (600104.SH), the country’s largest automaker, plans to sell 6 million annually by 2015.