People hike on the Xunfeng Hill during the International Labor Day holiday in Guangzhou, south China's Guangdong Province, May 2, 2020. (Xinhua/Lu Hanxin)

People enjoy themselves in a park during the International Labor Day holiday in the outskirts of Guangzhou, south China's Guangdong Province, May 2, 2020. (Xinhua/Lu Hanxin)

People enjoy themselves in a park during the International Labor Day holiday in the outskirts of Guangzhou, south China's Guangdong Province, May 2, 2020. (Xinhua/Lu Hanxin)

Children play with water in a park during the International Labor Day holiday in the outskirts of Guangzhou, south China's Guangdong Province, May 2, 2020. (Xinhua/Lu Hanxin)

People enjoy themselves in a park during the International Labor Day holiday in the outskirts of Guangzhou, south China's Guangdong Province, May 2, 2020. (Xinhua/Lu Hanxin)

A citizen fishes at a park during the International Labor Day holiday in the outskirts of Guangzhou, south China's Guangdong Province, May 2, 2020. (Xinhua/Lu Hanxin)