[1] Although not having much academic knowledge, with Bùi Thị Nhạn as empress of Quang Trung emperor and Quang Toản as his cousin who later became the crown prince, Bùi Đắc Tuyên was assigned as the deputy of Ministry of Rites (Vietnamese: Thị Lang bộ Lễ) and was allowed to work in emperor's palace.
He appointed Tuyên, a favourite of his, to the position "Grand Preceptor" (Vietnamese: thái sư, Chinese: 太師).
[2][3] His behavior angered many ministers and generals, and in 1795, Kỷ persuaded Vũ Văn Dũng to stage a coup against Tuyên.
Dũng, Phạm Công Hưng, and Nguyễn Văn Huấn besieged Tuyên's house and put him in prison.
[2][3] Dũng ordered Nguyễn Quang Thùy to arrest Ngô Văn Sở, who was a political ally of Tuyên, in Tonkin.