Aerial photo shows the greenhouses of Jianghe agricultural complex in Quannan County, east China's Jiangxi Province, Oct. 10, 2018. Taking advantage of its mountain climate, which has a big temperature difference between day and night, Quannan County established the Jianghe agricultural complex featuring a combination of modern agriculture, sightseeing tourism and new rural construction. The complex, which covers an area of about 50,000 mu (3,333 hectares), adopts a standardized management mode to develop the alpine vegetable planting and plays a role in helping local farmers increase income. (Xinhua/Hu Chenhuan)