Zhonghuamen, known as Jubaomen in the Ming Dynasty, is the south gate of the Ming Dynasty capital city. It is the largest castle-style gate in the 13 gates of the inner wall of the Ming Dynasty in Nanjing. It is the best preserved and most complicated ancient city in the world today. castle. The main building of the Zhonghua Gate City Gate is engraved with the words "Zhonghuamen", which was inscribed by the former Kuomintang leader Chiang Kai-shek. Zhu Yuanzhang of Ming Taizu listened to the suggestion of Zhu Sheng, "Growing grain and building a wall", and worried about the bureaucratic work of casting wall tiles. So he ordered the name of the manufacturer on each brick. The final quality system is estimated to be Ming Taizu. Zhu Yuanzhang was first implemented in the world. In the early years of the Ming Dynasty, the craftsmen did not want to lose their heads, and the life-saving emperor was killing people. Now you see, the names on these wall tiles are still faintly identifiable.