A farmer tends to nectarine trees at a greenhouse in Jingzhuang village, Jishan county, Shanxi province, March 19. In recent years, the county has been focusing on growing agricultural products in controlled environments, developing partnerships among companies, cooperatives and farmers in order to improve local farmers' income. Controlled-environment agriculture involves growing agricultural products in controlled conditions, reducing the likelihood of crops being infected with diseases or being ruined by weather. [Photo/Xinhua]

An aerial photo shows greenhouses in a modern agricultural demonstration park in Xinzhuang village, Jishan county, March 19. [Photo/Xinhua]