A view of Yeyahu National Wetland Park in Beijing, Oct 5. [Photo by Gao Anming/chinadaily.com.cn]

Wild ducks fly at Yeyahu National Wetland Park in Beijing, Oct 5. [Photo by Gao Anming/ chinadaily.com.cn]

A view of Yeyahu National Wetland Park in Beijing, Oct 5. [Photo by Gao Anming/chinadaily.com.cn]

A view of Yeyahu National Wetland Park in Beijing, Oct 5. [Photo by Gao Anming/chinadaily.com.cn]

A view of Yeyahu National Wetland Park in Beijing, Oct 5. [Photo by Gao Anming/chinadaily.com.cn]

A view of Yeyahu National Wetland Park in Beijing, Oct 5. [Photo by Gao Anming/chinadaily.com.cn]

A view of Yeyahu National Wetland Park in Beijing, Oct 5. [Photo by Gao Anming/chinadaily.com.cn]