February 2, 1421 the first day of the first lunar month (1901), the Ming Dynasty moved the capital to Beijing.

Yongle Emperor Zhu Di emperor died from Beijing to launch Jingnan Battle, captured the capital, usurping the throne, initially still capital in Nanjing.
1421, the Ming Dynasty moved the capital to Beijing, and change Beijing for the capital, at the same time to recover from Nanjing name. (Lssjt.cn)
Yongle Emperor moved the capital to Beijing, Nanjing, the capital position to retain and to retain a central agency. , Nanjing and capital, the same level of set six, Supervising Council, through the Secretary, five-Military Government, the Imperial Academy, Imperial College and other institutions, officials and the capital. Beijing where the government Shuntian, Nanjing where the government is Yingtianfu, collectively known as the Second Beijing government. (����d��y����h�� $ �Ө�ry.c��m)