This is a swan shot in Guanting Reservoir National Wetland Park in Huailai, Hebei Province on March 5. Xinhua News Agency (Photographed by Sun Huijun)

In recent years, Huailai, Hebei Province, has repaired the ecosystem of Guanting Reservoir through ecological water supplement, returning farmland to wetlands and other measures. The wetland ecological environment has been continuously improved, and the number of wild birds has increased significantly. "Flying birds become clouds" is often seen.

This is a swan shot in Guanting Reservoir National Wetland Park in Huailai, Hebei Province on March 7. Photographed by Huang Xiaoyong, reporter of Xinhua News Agency

This is a swan shot in Guanting Reservoir National Wetland Park in Huailai, Hebei Province on March 5. Xinhua News Agency (Photographed by Sun Huijun)

On March 7, birds flew in the air in the Guanting Reservoir National Wetland Park in Huailai, Hebei Province. Photographed by Huang Xiaoyong, reporter of Xinhua News Agency

On March 7, birds flew in the air in the Guanting Reservoir National Wetland Park in Huailai, Hebei Province. Photographed by Huang Xiaoyong, reporter of Xinhua News Agency

On March 7, swans flew in the air in the Guanting Reservoir National Wetland Park in Huailai, Hebei Province. Photographed by Huang Xiaoyong, reporter of Xinhua News Agency

On March 7, swans flew in the air in the Guanting Reservoir National Wetland Park in Huailai, Hebei Province. Photographed by Huang Xiaoyong, reporter of Xinhua News Agency

On March 7, birds flew in the air in the Guanting Reservoir National Wetland Park in Huailai, Hebei Province. Photographed by Huang Xiaoyong, reporter of Xinhua News Agency

Source: Xinhua News Agency

Edited by Xu Weiwei

Second instance Li Jie

Third instance Tian Minjia