Dongbai Lake is named because of its location under the Dongbai Mountain. It is also known as Chencai Reservoir. It is located in the southeast of Zhuji City. It is on the Chencai River in the upper reaches of the Kaihua River in the Puyang River. Upstream, there are Shanglin River, Hetu River, Xitang River, Liuzi River and Diankou River going into the reservoir. The lake area has a beautiful environment, surrounded by dense forest, smoke-filled, near-originated vegetation, and excellent ecological conditions. Under the Dongbai Lake Dam, Dongbai Mountain Villa was built. The elegant three-story small building is hidden in the green trees. It is well-equipped and has good service.