People visit a greenhouse at a modern agricultural science and technology demonstration park in Guanqiao Village of Jiayu County, central China's Hubei Province, April 11, 2019. (Photo: Xinhua)

Aerial photo taken on April 10, 2019 shows greenhouses at a modern agricultural science and technology demonstration park in Guanqiao Village of Jiayu County, central China's Hubei Province. (Photo: Xinhua)

A child views seedlings at a greenhouse of a modern agricultural science and technology demonstration park in Guanqiao Village of Jiayu County, central China's Hubei Province, April 11, 2019. (Photo: Xinhua)

Farmers work at a greenhouse of a modern agricultural science and technology demonstration park in Guanqiao Village of Jiayu County, central China's Hubei Province, April 10, 2019. (Photo: Xinhua)

Aerial photo taken on April 10, 2019 shows a greenhouse at a modern agricultural science and technology demonstration park in Guanqiao Village of Jiayu County, central China's Hubei Province. (Photo: Xinhua)

People visit a greenhouse at a modern agricultural science and technology demonstration park in Guanqiao Village of Jiayu County, central China's Hubei Province, April 11, 2019. (Photo: Xinhua)

Farmers work at a greenhouse at a modern agricultural science and technology demonstration park in Guanqiao Village of Jiayu County, central China's Hubei Province, April 10, 2019. (Photo: Xinhua)