"It used to be the poor part, but there's more and more wealth there," said Mastro, who plans to start selling Aventador and Gallardo sports cars in china Changsha, Shenyang, Taiyuan this year. "We have to be there." Lamborghini, Rolls Royce Plc and Bentley already say their biggest market is China, where Cap Gemini SA and Bank of America Corp. estimate is home to half a million millionaires with $2.7 trillion in wealth. Chinese showrooms accounted for 10 out of 12 of Porsche's best performing dealerships globally, the company says.