Aerial photo taken on March 26, 2020 shows tourists visiting a pear orchard in Ningling County of Shangqiu, central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on March 26, 2020 shows tourists visiting a pear orchard in Ningling County of Shangqiu, central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on March 26, 2020 shows a view at a pear orchard in Ningling County of Shangqiu, central China's Henan Province. (Xinhua/Feng Dapeng)

Tourists visit a pear orchard in Ningling County of Shangqiu, central China's Henan Province, March 26, 2020. (Xinhua/Feng Dapeng)

Aerial photo taken on March 26, 2020 shows tourists visiting a pear orchard in Ningling County of Shangqiu, central China's Henan Province. (Xinhua/Feng Dapeng)

Photo taken on March 26, 2020 shows a giant pear tree at a pear orchard in Ningling County of Shangqiu, central China's Henan Province. (Xinhua/Feng Dapeng)