Name；Zhu Qizhen (1427-1464)
Enthronement in 1435
Abdication in 1449
Zhu Qizhen was the eldest son of Zhu Zhanji, and his era name was Zhengtong(正统). He was enthroned at the age of 9, and then the whole government was mastered by Wang Zhen, a eunuch. In 1449, army of Qirat (a minority used to live in the north of China) southwardly invaded midland, and Emperor Yingzong was captured. This historical incident was named officially Tumuzhibian(土木之变). In 1450, Emperor Yingzong was released. He was not emperor once again until in 1457, and he died in 1464 at the age of 37.

Emperor Renzong

Name: Zhu Gaochi(1378-1425)

Enthronement in 1424
Abdication in 1425
Zhu Gaochi was the eldest son of Emperor Chengzhu of Ming Dynasty, and his era name was Hongxi（洪熙）, Emperor Renzong was clear and bright in political administration. He also took many measures to relieve the social problems. He just was an Emperor for one year and died at the age of 48.

Emperor Xuanzong
Name: Zhu Zhanji (1398-1435)
Enthronement in 1425
Abdication in 1435
Zhu Zhanji was the eldest son of Emperor Rengzong and its era name was Xuande(宣德). The same as his father, he was willing to accepting the viewpoints and suggestions of his officials. At his reign time, he had a good touch with his officials and the economic development is also stable. Emperor Xuanzong died at the age of 38.

Name：Zhu Di (1360--1424)
Enthronement in 1402
Abdication in 1424
Emperor Zhu Di was the fourth son of Zhu Yuanzhang, and his era name was Yongle(永乐). In the name of eliminating the cursed officials, he came back to Nanjing and launched a famous historical incident, which was Jingnanzhiyi(靖难之役) in historical record. And after four-year civil war, Zhu Di successfully defeated the former royal troops, and got the sovereignty of Ming Dynasty. He was Emperor Chengzu, and in 1421 he moved Capital from Nanjing to Beijing. He also demanded his officials to edit a series of book named Yongle Dadian (永乐大典), which once was the largest series of book in the world. He died at the age of 65.