A Chinese teenager sold by his birth parents as a child and later abandoned by them after a recent reunion has allegedly died by suicide. Liu Xuezhou, 17, was found dead on a beach in the southern Chinese island province of Hainan on Monday morning. The teenager had left a note on Weibo, the Chinese social media equivalent of Twitter. Local police in Sanya city launched a search operation after they were alerted by the public, the South China Morning Post reported. His story grabbed nationwide attention when he shared a video on 6 December last year in which he…