jp. 曾淵海, ko. 쩡위안하이
Student of short-time professional Liu Yiyi, who retired and continued as a strong amateur.
He had two other teachers, both of whom were apparently also amateurs: Li Jiaqing and Hu Yuqing. Hu represented China in the 2010 Korean Prime Minister's Cup.
1p 2017, 2p 2018