Children have fun at the Guanshan Lake Park in Guiyang City, southwest China's Guizhou Province, July 29, 2020. Covering an area of 5,500 Mu (about 367 hectares), the Guanshan Lake Park serves as the "green lungs" of Guiyang City. (Xinhua/Tao Liang)

People exercise at the Guanshan Lake Park in Guiyang City, southwest China's Guizhou Province, July 29, 2020. Covering an area of 5,500 Mu (about 367 hectares), the Guanshan Lake Park serves as the "green lungs" of Guiyang City. (Xinhua/Tao Liang)

Aerial photo taken on July 29, 2020 shows the scenery at the Guanshan Lake Park in Guiyang City, southwest China's Guizhou Province. Covering an area of 5,500 Mu (about 367 hectares), the Guanshan Lake Park serves as the "green lungs" of Guiyang City. (Xinhua/Tao Liang)

Aerial photo taken on July 29, 2020 shows the scenery at the Guanshan Lake Park in Guiyang City, southwest China's Guizhou Province. Covering an area of 5,500 Mu (about 367 hectares), the Guanshan Lake Park serves as the "green lungs" of Guiyang City. (Xinhua/Tao Liang)

Aerial photo taken on July 29, 2020 shows the scenery at the Guanshan Lake Park in Guiyang City, southwest China's Guizhou Province. Covering an area of 5,500 Mu (about 367 hectares), the Guanshan Lake Park serves as the "green lungs" of Guiyang City. (Xinhua/Tao Liang)

Aerial photo taken on July 29, 2020 shows the scenery at the Guanshan Lake Park in Guiyang City, southwest China's Guizhou Province. Covering an area of 5,500 Mu (about 367 hectares), the Guanshan Lake Park serves as the "green lungs" of Guiyang City. (Xinhua/Tao Liang)

Aerial photo taken on July 29, 2020 shows the scenery at the Guanshan Lake Park in Guiyang City, southwest China's Guizhou Province. Covering an area of 5,500 Mu (about 367 hectares), the Guanshan Lake Park serves as the "green lungs" of Guiyang City. (Xinhua/Tao Liang)