Changes of Hanfeng Lake from ancient times to the present.

Hanfeng Lake is a modern artificial lake.

Hanfeng Lake is a unique artificial lake in the world, which is built by the Three Gorges Project of the Yangtze River and attracts worldwide attention. Kaixian Immigration New Town is located on this lakeside, which constitutes a beautiful picture of "the city is in the lake, the lake is in the mountains, and the intention is in the heart". Surrounded by mountains, Hanfeng Lake is integrated with the city, with unique natural and cultural landscapes such as lakeside wetland, wind and rain covered bridge and Yangxin Garden in Kaizhou.

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When the water level of the Three Gorges Reservoir reaches1.75m after the flood, the surging Yangtze River water will flow back to Pengxi River in Kaizhou from east to west, and Kaizhou will form a flooded water area of 55.5 square kilometers. However, after the reservoir water level drops, a large water level fluctuation zone may be formed, which will do harm to the ecological environment of Kaizhou.

In order to solve this problem, a dam was built 4.5 kilometers downstream of Pengxi River, which flows through Kaizhou. In this way, a lake with a perennial water level of 172- 175 meters, a perimeter of 36.4 kilometers and a water area of 14.8 square kilometers will be formed in the upper reaches of the regulating dam: Hanfeng Lake will come from this.