A farmer hoes in Cheng County of Longnan City, northwest China's Gansu province, March 19, 2014. Winter-sown crops are being harvested in Longnan. (Xinhua/Zhang Meng)
Farmers harvest at a greenhouse in Cheng County of Longnan City, northwest China's Gansu province, March 19, 2014. Winter-sown crops are being harvested in Longnan. (Xinhua/Zhang Meng)
Farmers load vegetables in Hanwang Town of Longnan City, northwest China's Gansu province, March 19, 2014. Winter-sown crops are being harvested in Longnan. (Xinhua/Zhang Meng)