 One of them was Bak Bulhwa, who caused harm to Goryeo.There were eunuchs from China's various ethnic tribes, Mongolia, Korea, Vietnam, Cambodia, Central Asia, Thailand, and Okinawa.There were Korean, Jurchen, Mongol, Central Asian, and Vietnamese eunuchs under the Yongle Emperor, including Mongol eunuchs who served him while he was the Prince of Yan.