Lady Chính married Minh Mạng while he was still as Crown Prince. In 1820, Minh Mạng crowned, lady Chính was granted the title "Cung tần" ("Imperial maid"), as well as other concubines of him. Because at that time, lady Hồ Thị Hoa had died after giving birth to Miên Tông (Thiệu Trị later), lady Chính was the primary wife of Minh Mạng, leader of the harem. 