Ngô Thị Chính

Ngô Thị Chính (or Chánh) (1792 – 1843) was an imperial consort of Emperor Minh Mạng of the Nguyễn Dynasty in Vietnamese History.
Biography.
Ngô Thị Chính was born in Đăng Xương, Huế, daughter of "Attorney General" Ngô Văn Sở and lady Nguyễn Thị Đích. She also had 2 younger brother named Thắng and Thọ.
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. 
Not long after that, she was granted Tam giai Hiền tần ("Third-rank of Royal Concubine Hiền tần"). The First and Second-rank was emptied, so Hiền tần still kept the highest rank in the harem. In 1836, she was elevated to Nhất giai Hiền phi ("First-rank of Royal Concubine Hiền phi").
Although more than 40, Hiền Phi still gave birth to a son, proving that she was still loved by the emperor despite her age.
In 1843, Hiền Phi died at 52 years old and was buried at Hương Thủy, Huế. Emperor Thiệu Trị granted the posthumous name for Hiền phi, was Tuệ Khiết.
Children.
Hiền phi Ngô Thị Chính gave birth to 9 children for Minh Mạng: