An automatic sprinkler irrigates newly-planted corn at a field in Linzi district of Zibo city, East China's Shandong province, June 6, 2018. The agricultural mechanization in Linzi district has been greatly improved in recent years to help local farmers do more efficiently in farm work. [Photo/Xinhua]   

Farmers plant corn using a seeder at a field in Linzi district of Zibo city, East China's Shandong province, June 7, 2018. The agricultural mechanization in Linzi district has been greatly improved in recent years to help local farmers do more efficiently in farm work. [Photo/Xinhua]