Tourists enjoy leisure time at Wulongtan park in Jinan, east China's Shandong Province, March 19, 2020. [Photo/Xinhua]

Tourists view flowers at Wulongtan park in Jinan, east China's Shandong Province, March 19, 2020. [Photo/Xinhua]

A tourist takes photos of flowers at Wulongtan park in Jinan, east China's Shandong Province, March 19, 2020. [Photo/Xinhua]

Photo taken on March 19, 2020 shows flowers at Wulongtan park in Jinan, east China's Shandong Province. [Photo/Xinhua]

Photo taken on March 19, 2020 shows a view at Wulongtan park in Jinan, east China's Shandong Province. [Photo/Xinhua]

Photo taken on March 19, 2020 shows a view at Wulongtan park in Jinan, east China's Shandong Province. [Photo/Xinhua]

Aerial photo taken on March 19, 2020 shows a view of Hongfenghu Township in Qingzhen, southwest China's Guizhou Province. [Photo/Xinhua]

Aerial photo taken on March 19, 2020 shows a view of Hongfenghu Township in Qingzhen, southwest China's Guizhou Province. [Photo/Xinhua]

Aerial photo taken on March 19, 2020 shows a view of Hongfenghu Township in Qingzhen, southwest China's Guizhou Province.[Photo/Xinhua]

Tourists view flowers in Hongfenghu Township in Qingzhen, southwest China's Guizhou Province, March 19, 2020. [Photo/Xinhua]

Aerial photo taken on March 19, 2020 shows a view of Hongfenghu Township in Qingzhen, southwest China's Guizhou Province. [Photo/Xinhua]

Aerial photo taken on March 19, 2020 shows a view of Hongfenghu Township in Qingzhen, southwest China's Guizhou Province. [Photo/Xinhua]