 In 1399, Zhu Di launched a coup d'état and ascended to the throne to become Yongle Emperor in 1402.In 1403, the name of Beiping was changed to Beijing (literally "the Northern Capital"), and in 1406 a plan was drafted to move the capital to Beijing.In 1406, construction of the Forbidden City began, copying the layout of the existing palaces in Nanjing.