The area of Shenglong Huangcheng City is about 18,400 square meters. It is concentrated in the archaeological area of No. 18 Huangyao Road in Hanoi and the ancient city of Hanoi. It is the intersection of Vietnamese sculpture art, architectural art, construction technology, urban planning and landscaping art. It is the most typical and historical monument in Vietnam. The millennium has carved a deep mark on the city of Thang Long, but as time goes by, there are few remains on the ground of the Dragon City. The Jingtian Temple, which was once located in the center of the forbidden city, is now a broken wall. Only the green dragon railings carved on both sides of the steps are still intact. Walking along the Huangcheng District for a week, the fragrance of the flowers and the antiques of the Imperial City are intertwined.