Yanguan Haitang and Haishen Temple are places where the ancient Chinese working people sacrificed the sea. It is located in Yanguan Haitang outside the south gate of Yanguan Town, Haining City, Zhejiang Province. The construction period is not allowed. Yanguan Haitang and Haishen Temple, most of the existing sea ponds were rebuilt in the Qing Dynasty. The existing buildings include Tianfeng Haitao Pavilion, Zhanyan Pagoda (now known as Zhenhai Pagoda), Zhongshan Pavilion, Zhenhaitang Tieniu and so on. Yanguan Haitang is a stone sea pond with complex engineering structure and is one of the three major water conservancy projects in ancient China. The Haishen Temple is an official-style building in Yuan and is an important part of Haitang. It is located at 150 Chunxi Road, Yanguan Town, covering an area of about 2.7 million square meters. The Haishen Temple is the largest relic of the Guanjian style building in Jiangnan area, fully showing the exquisite craftsmen's craftsmanship and perfect artistic shape, and is the crystallization of the wisdom and art of the working people of China.