A heron flies over the Yongding River in Beijing Garden Expo Park in Beijing, capital of China, Jan. 21, 2021. (Xinhua/Li Xin)
Herons rest at the Yongding River in Beijing Garden Expo Park in Beijing, capital of China, Jan. 21, 2021. (Xinhua/Li Xin)
A heron flies over the Yongding River in Beijing Garden Expo Park in Beijing, capital of China, Jan. 21, 2021. (Xinhua/Li Xin)
Birds frolic at the Yongding River in Beijing Garden Expo Park in Beijing, capital of China, Jan. 21, 2021. (Xinhua/Li Xin)
Birds rest at the Yongding River in Beijing Garden Expo Park in Beijing, capital of China, Jan. 21, 2021. (Xinhua/Li Xin)
Birds rest at the Yongding River in Beijing Garden Expo Park in Beijing, capital of China, Jan. 21, 2021. (Xinhua/Li Xin)
Birds rest at the Yongding River in Beijing Garden Expo Park in Beijing, capital of China, Jan. 21, 2021. (Xinhua/Li Xin)