The Dashi Pavilion is located in the Yong'an ancient city site of Shankou Village, 80 kilometers east of Hepu County, Guangxi Zhuang Autonomous Region.

Yong'an City, a coastal city close to the North Bay, was one of the key sentry posts along the coast that withstood foreign invasions in ancient China. The Dashi Pavilion, commonly known as Sipailou, was built in 1576. As one of the Buddhist buildings in Yong'an City, the pavilion enshrined many Buddhist statues, including that of Kwan-yin, where the pavilion got its name.

The Dashi Pavilion, which is three rooms wide and six rooms deep, actually consists of two connecting, open pavilions with no porch or courtyard between them. The pavilion has two stories. The upper floor was constructed into a loft surrounded by wooden boards with a door and windows; the floor is paved with boards. The ground floor is wide open with no enclosures. The pavilion has a double-eaved gable and hip roof where each layer of eaves has nine ridges embossed with a phoenix, two dragons playing with a large pearl, birds, trees, rare flowers and grass.

Although the Dashi Pavilion was built in the Ming Dynasty (1368-1644), it mainly adopted the architectural techniques from previous dynasties, namely the Song (960-1279) and Yuan (1271-1368) period. The pavilion provides important information on the study of southern architecture in China.