A farmer picks melons in a greenhouse at Liulangwo Village of Laoting County, north China's Hebei Province, March 20, 2018. (Xinhua/Yang Shiyao)
2018-03-21
A farmer picks melons in a greenhouse at Liulangwo Village of Laoting County, north China's Hebei Province, March 20, 2018. (Xinhua/Yang Shiyao)
Xinhua