Aerial photo taken on Nov. 27, 2018 shows farmers loading Chinese cabbages onto a vehicle in Daxianggezhuang Township of Laoting County, north China's Hebei Province. Laoting County has relied on vegetable growing to boost village development and increase farmers' incomes, planting more than 33,533 hectares of vegetables and realizing annual output of 3.2 million tonnes. (Xinhua/Yang Shiyao)

　　Women work in a greenhouse in Laoting Town of Laoting County, north China's Hebei Province, on Dec. 12, 2018. Laoting County has relied on vegetable growing to boost village development and increase farmers' incomes, planting more than 33,533 hectares of vegetables and realizing annual output of 3.2 million tonnes. (Xinhua/Zhang Fengguo)

　　Aerial photo taken on Dec. 12, 2018 shows vegetable greenhouses with modern techonogies in Laoting Town of Laoting County, north China's Hebei Province. Laoting County has relied on vegetable growing to boost village development and increase farmers' incomes, planting more than 33,533 hectares of vegetables and realizing annual output of 3.2 million tonnes. (Xinhua/Yang Shiyao)

　　Workers load Chinese chives at the Jidong international farm produce logistics center in Laoting County, north China's Hebei Province, on Dec. 13, 2018. Laoting County has relied on vegetable growing to boost village development and increase farmers' incomes, planting more than 33,533 hectares of vegetables and realizing annual output of 3.2 million tonnes. (Xinhua/Yang Shiyao)

　　A woman grafts vegetable plants at a greenhouse in Laoting Town of Laoting County, north China's Hebei Province, on Dec. 12, 2018. Laoting County has relied on vegetable growing to boost village development and increase farmers' incomes, planting more than 33,533 hectares of vegetables and realizing annual output of 3.2 million tonnes. (Xinhua/Zhang Fengguo)

　　Aerial photo taken on Nov. 27, 2018 shows a farmer arranging Chinese cabbages in Daxianggezhuang Township of Laoting County, north China's Hebei Province. Laoting County has relied on vegetable growing to boost village development and increase farmers' incomes, planting more than 33,533 hectares of vegetables and realizing annual output of 3.2 million tonnes. (Xinhua/Yang Shiyao)

　　Aerial photo taken on Dec. 12, 2018 shows vegetable greenhouses in Panggezhuang Township of Laoting County, north China's Hebei Province. Laoting County has relied on vegetable growing to boost village development and increase farmers' incomes, planting more than 33,533 hectares of vegetables and realizing annual output of 3.2 million tonnes. (Xinhua/Yang Shiyao)

　　A man takes care of tomato plants at a greenhouse in Tingliuhe Town of Laoting County, north China's Hebei Province, on Dec. 12, 2018. Laoting County has relied on vegetable growing to boost village development and increase farmers' incomes, planting more than 33,533 hectares of vegetables and realizing annual output of 3.2 million tonnes. (Xinhua/Yang Shiyao)

　　A worker takes care of seedlings at a greenhouse in Laoting Town of Laoting County, north China's Hebei Province, on Dec. 12, 2018. Laoting County has relied on vegetable growing to boost village development and increase farmers' incomes, planting more than 33,533 hectares of vegetables and realizing annual output of 3.2 million tonnes. (Xinhua/Zhang Fengguo)

　　A worker takes care of seedlings at a greenhouse in Laoting Town of Laoting County, north China's Hebei Province, on Dec. 12, 2018. Laoting County has relied on vegetable growing to boost village development and increase farmers' incomes, planting more than 33,533 hectares of vegetables and realizing annual output of 3.2 million tonnes. (Xinhua/Yang Shiyao)