On this day 604 years ago, on February 2, 1421 (January 1, 1421 lunar calendar), the Ming Dynasty officially moved the capital to Beijing. Emperor Chengzu of Ming Zhu Di launched the "Battle of Jingyuan" from Peiping after the death of Zhu Yuanzhang, captured the capital, seized the throne, and was still the capital of Nanjing at the beginning. February 2, 1421 The Ming Dynasty moved the capital to Beijing, and changed Beijing to the capital, and restored the name of Nanjing at the same time. After Emperor Chengzu of Ming moved the capital to Beijing, Nanjing still retained its status as the capital and retained a set of central institutions. Nanjing, like the capital, had six departments, the capital inspectorate, the General Department, the five military governor's office, the Hanlin Academy, and the Guozijian. The rank of officials was also the same as that of the capital. The government where Beijing is located is Shuntianfu, and the government where Nanjing is located is Yingtianfu, collectively known as Erjing Mansion.