Photo taken on Oct. 22, 2020 shows the autumn view of Beijing Olympic Forest Park in Beijing, capital of China. (Xinhua/Luo Xiaoguang)

Photo taken on Oct. 23, 2020 shows ducks at Xihai Wetland Park in Beijing, capital of China. (Xinhua/Luo Xiaoguang)

Photo taken on Oct. 23, 2020 shows the autumn view of Xihai Wetland Park in Beijing, capital of China. (Xinhua/Luo Xiaoguang)

Photo taken on Oct. 23, 2020 shows the autumn view of Xihai Wetland Park in Beijing, capital of China. (Xinhua/Luo Xiaoguang)