U.S. chipmaker Qualcomm Inc (QCOM.O) said it has appointed old-hand Frank Meng as its chairman for China, a market which accounts for half of the company’s overall revenues but where it has hit rough patches in recent times. Qualcomm also said Wang Xiang would leave his role as president of Greater China. Wang will head for Chinese smartphone maker Xiaomi Inc [XTC.UL], the Beijing-based five-year-old upstart, which was valued at $45 billion in December, announced in a separate statement.