What is "weixiao"

Gao Xuecheng (born April 4, 1997), better known by his in-game ID WeiXiao, was a Chinese League of Legends profession player for the team World Elite. He is a notable player of the "AD Carry" position, renowned for his Ezreal (A character of League of Legends) play. He has had high achievements both in the Chinese league as well as internationally. Gao, 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.