Dongqian Lake, also known as Qianhu Lake and Wanjin Lake, is a famous scenic spot in Zhejiang Province, 15 kilometers away from the east of Ningbo. The southeast of the lake is backed by Qingshan Mountain, and the northwest of the lake is close to the plain, that is, the east longitude is 121°34', and the north latitude is 28 °52′, which is part of the geology of Fujian and Zhejiang, is a natural lagoon formed by geological movements in ancient times. It was praised by Mr. Guo Moruo as “West Lake scenery, Taihu Lake”. Dongqian Lake consists of three parts: Guzi Lake, Meihu Lake and Waihu Lake. It is 8.5 kilometers long from north to south, 6.5 kilometers wide from east to west, 45 kilometers from the circumference of the lake, and covers an area of 22 square kilometers. It is the largest (natural) freshwater lake in Zhejiang Province. It is 3 times of Hangzhou West Lake, with an average water depth of 2.2 meters and a total water storage capacity of 33.9 million cubic meters.