Chinese Official Disputes GM Claim BEIJING - A top Chinese commerce official said Monday that General Motors Corp. hasn't provided enough evidence to prove that a local company copied one of its car models. GM China says it is investigating what it sees as similarities between its Spark minicar and Chery Automobile Corp.'s QQ model. Deputy Commerce Minister Zhang Zhigang, speaking at a news briefing to launch a one-year crackdown on rampant violations of intellectual property rights in China, said there was not enough evidence to pursue a case against the Chinese manufacturer. "Unless GM provides further evidence to prove...