The Kuahuqiao site (Chinese: 跨湖桥遗址; pinyin: Kuahuqiao yizhi) is an early Neolithic site of (跨湖桥文化 Kuahuqiao Wenhua) near Xianghu village, Xiaoshan District, in suburban Hangzhou, Zhejiang, China. It was first discovered in the early 1970s during the construction of a local brick factory, which destroyed a large part of the site. But the professional excavations first started in 1990. The site is located near the place where the Qiantang River flows into Hangzhou Bay, and it has a history of 8,000 years. Rising sea levels may have suddenly deluged the area around 7,550 years ago.