Tianjin was built in the second year of Yongle in the Ming Dynasty (1404), so it was named "Jinmen" because it was located at the gateway of Guifu. In the postscript of Shanghai in Qing Dynasty, Wang Tao said: "That is, if westerners disturb Tianjin, they will take Tianjin as the most important place and think that they will defend Shenjing."
Tianjin was founded on 1404. After Ming Taizu Judy ascended the throne, she established a garrison in Tianjin. 1406, Ming Chengzu ordered Huang Fuxiu, the minister of the Ministry of Industry, to build the wall of Tianjinwei, and set up a gate in the east, west, north and south. 1493, the city wall was further renovated and a gatehouse was built on the city gate. At that time, the doorsteps of Tianjinwei were named after Gongbei, Zhendong, Anxi and Dingnan respectively.
In the 13th year of Emperor Kangxi of Qing Dynasty (1674), Zhao Liangdong, the viceroy of Tianjin, rebuilt the city of Tianjin, and re-engraved four tablets, namely, East meets the sea, West draws Taihang Mountain, South reaches Jianghuai and North arches Beijing. The four doors that have gone through vicissitudes no longer exist, but they have become the origin of place names such as "East Gate", "West Gate", "South Gate" and "North Gate". Many street names come from four city gates, such as "outside the south gate" and "inside the north gate". Also produced such as "South Gate West", "West Gate South" and other street office names.