Baoxiang Bai (born 1992-12-31) is a Chinese amateur player and winner of the 2011, 2016 and 2017 WAGC. See http://ranka.intergofed.org/?p=5599 for tournaments he has won.
He is called one of China's Four Titans of Amateur Go. The other 3 are Yu Quing Hu, Ma Tianfang, and Wang Chen.
There's a good interview at http://www.ranka.intergofed.org/?p=14157