The year of construction is uncertain. Some say it was in the 22nd year of Jiaqing (1817), while others say it was in the 12th year of Daoguang (1832). The main reason for the construction was to prevent pirate invasion and British smuggling and to strengthen the coastal defense in the east of the Pearl River. The fort and the fort are surrounded by mountains on three sides, and face Tung Chung Bay and Chek Lap Kok in the north. They are slightly square and have an area of about 70 meters x 80 meters. The city wall is built with granite, and the upper structure is built with blue bricks commonly seen in South China. The wall is about three meters high and one to two meters thick. The fort has three arched gates, namely the "Gongchen Gate" on the north main gate, the "Jiexiu Gate" on the east, and the "Liangeng Gate" on the west. All of them have brick guard towers. There are two stoves in the tower for the soldiers to cook. There are small houses in front of the city for the garrison to live in, one of which is a medical clinic, and there used to be a cemetery behind it. Behind the north gate is the gun room, which was originally the headquarters of the barracks. It is now used as an exhibition center to introduce the history of Tung Chung's cultural relics and monuments. There is a square in the city for military training. There are six cannons in total, but because the range is too far to reach the coast, scholars suspect that the cannons were not originally installed here or were moved from somewhere else. There are also 480 garrison troops commanded by a garrison. In 1898, Britain leased the New Territories and the officers and soldiers withdrew from the city. Later, the city was used as a police station, school building, and the seat of the Tung Chung Rural Committee. It was listed as a statutory monument in 1979.