Aerial photo taken on May 8, 2021 shows fogs floating over Guanshanhu District in Guiyang, capital of southwest China's Guizhou Province. (Xinhua/Liu Xu)

Aerial photo taken on May 8, 2021 shows fogs floating over Guanshanhu District in Guiyang, capital of southwest China's Guizhou Province. (Xinhua/Liu Xu)

Aerial photo taken on May 8, 2021 shows fogs floating over Guanshanhu District in Guiyang, capital of southwest China's Guizhou Province. (Xinhua/Liu Xu)

Aerial photo taken on May 8, 2021 shows fogs floating over Guanshanhu District in Guiyang, capital of southwest China's Guizhou Province. (Xinhua/Liu Xu)

Aerial photo taken on May 8, 2021 shows fogs floating over Guanshanhu District in Guiyang, capital of southwest China's Guizhou Province. (Xinhua/Liu Xu)

Aerial photo taken on May 8, 2021 shows fogs floating over a park at Guanshanhu District in Guiyang, capital of southwest China's Guizhou Province. (Xinhua/Liu Xu)