At the end of Yuan Dynasty, after Zhu Yuanzhang defeated Zhang Shicheng and Chen Youliang, he thought about building the capital. Where should he choose land? Zhu Yuanzhang was born as a farmer, and the emperor, like ordinary people, hoped to honor his ancestors and benefit his hometown, so Fengyang in Anhui was his best choice. He chose Fengyang, Anhui Province, not only for glorifying his ancestors, but also because Nanjing is too far away from the Central Plains to control the north. Moreover, people who win the world, if they can't build their capital in the Central Plains, of course, can't control the world. However, Fengyang is close to the Central Plains. Moreover, Fengyang also has the Yangtze River and Huaihe River as a natural barrier, which is convenient for transporting grain. After hearing this, the ministers were shocked and unacceptable except for Zhu Yuanzhang's fellow villagers in Huaixi. Because Fengyang is really poor, small in area and backward in economy, there is no danger around it to defend. In any case, construction is not the right choice. The emperor's words cannot be disobeyed, and the emperor still has a point.
So he started construction, and the mighty capital construction project of Fengyang in Anhui Province began, but such a move was opposed by Liu Bowen. Liu Bowen said a word to Zhu Yuanzhang after his field trip? Although Fengyang is the emperor's hometown, isn't it the capital? It is better to choose Nanjing as Kyoto, mainly because it is easy to attack and difficult to defend. After all, Liu Bowen knows astronomy above and geography below, and has a high position in Zhu Yuanzhang's heart. Finally, Zhu Yuanzhang officially changed Nanjing as the capital, and the problem of building the capital in ten years was completely solved.
This is why Kyoto ended up in Nanjing.