Zhengtong () (18 January 1436 – 13 January 1450) was the era name used by Emperor Yingzong, the sixth emperor of the Ming dynasty of China, after he ascended the throne for the first time. It was used for a total of 14 years. On 1 September 1449 (Zhengtong 14, 15th day of the 8th month), Emperor Yingzong was captured at the Tumu Crisis. On 6 September (6th day of the 9th month), the Jingtai Emperor ascended to the throne and continued to use the Zhengtong era name. In the following year, the era name was changed to Jingtai. Comparison table Other eras contemporaneous with Zhengtong China Taiding (泰定, 1448–1449): Ming period — era name of Chen Jianhu (陳鑑胡) Dongyang (東陽, 1449–1450): Ming period — era name of Huang Xiaoyang (黃蕭養) Vietnam Thiệu Bình (紹平, 1434–1439): Later Lê dynasty — era name of Lê Thái Tông Đại Bảo (大寶, 1440–1442): Later Lê dynasty — era name of Lê Thái Tông Đại Hòa (大和) or Thái Hòa (太和) (1443–1453): Later Lê dynasty — era name of Lê Nhân Tông Japan Eikyō (永享, 1429–1441): era name of Emperor Go-Hanazono Kakitsu (嘉吉, 1441–1444): era name of Emperor Go-Hanazono Bun'an (文安, 1444–1449): era name of Emperor Go-Hanazono Hōtoku (宝徳, 1449–1452): era name of Emperor Go-Hanazono See also List of Chinese era names List of Ming dynasty era names References Chinese imperial eras