What is "xiaoweixiao"

Yu Xian (born April 4, 1997), better known by his in-game ID XiaoWeiXiao, is a Chinese League of Legends professional player for the team Team Impulse and, previously LMQ. He is a notable player of the "Mid Lane" position, renowned for his Yasuo (A character of League of Legends) play. He has had high achievements both in the North America league as well as internationally. Yu, in his prime, has been considered by many analysts and other players in the League of Legends scene as one of the most mechanically skillful players.