Four men use sledgehammers to destroy an earlier Maserati Quattroporte limousine worth 2.6 million yuan ($423,000) outside the Qingdao International Convention Center in Shandong province, which is now holding the 12th Qingdao International Auto Show, May 14, 2013. The owner of the vehicle said the auto trader cheated him by installing used parts on the car when he had it repaired.