The introductory music was thumping, the male dating show contestant had walked onstage, and now came the interview portion, where female guests asked questions. One of the women launched right in. “Hello, sir,” said the 59-year-old woman, Yu Xia, scrutinizing the prospect intently through her rectangular glasses. “Is your child a son or a daughter? You said your wife died three years ago — have you come out from that shadow? And your health, it’s pretty good, right?” Welcome to one of China’s hottest new genres of television: dating shows…