宣徳帝
Born near Nanjing in present-day Jiangsu Province during the Ming dynasty (1368–1644), Gong Zhen's dates of birth and death are not recorded but it is known that his father was a soldier. Gong Zhen was first appointed as an advisor to the Xuande Emperor (r. 1425–1435), then in 1431 he became secretary to the admiral Zheng He.