China is moving into the merger-and-acquisition major leagues, as its star corporations shop for American household names like Unocal, Maytag and IBM, looking for bigger profits through global ambitions. China's growing appetite for Western corporate icons is reflected computer maker Lenovo Group Ltd's recent takeover of IBM's personal computer business and two big deals reportedly in the making for Unocal Corp. and Maytag Corp. "I'd expect at least a half a dozen similar deals by the end of the year," said Jack J.T. Huang, chairman of international law firm Jones Day's Greater China practice. But the deals are not without...