A teenager in China who was sold at birth was left heartbroken after finally finding his birth parents and then being rejected by them. Liu Xuezhou, 17, from China's Hebei Province, posted about the heartbreaking reunion on Douyin on Monday, according to South China Morning Post . Liu managed to find his biological parents with the help of local authorities after he was reportedly encouraged to make a post online. After doing a DNA test, police were able to locate the teenager's father, Ding Shuangquan, and his mother, whose name was not revealed. Local authorities held a reunion for Liu…