Photo taken on June 4, 2015 shows grain fields at in Tengzhou, esat China' s Shandong Province. Shandong's summer grain output reached 23.473 billion kilograms this year, up 828 million kilograms from the previous year. Photo: Xinhua

Harvesters work on the farmland in Qingdao, esat China' s Shandong Province, June 16, 2015. Shandong's summer grain output reached 23.473 billion kilograms this year, up 828 million kilograms from the previous year. Photo: Xinhua 

A villager shows crops at Xiaogongshan Village of Dongshahe Town in Tengzhou, esat China' s Shandong Province, June 4, 2015. Shandong's summer grain output reached 23.473 billion kilograms this year, up 828 million kilograms from the previous year. Photo: Xinhua 

Farmers harvest crops at Chengang Village in Tengzhou, esat China' s Shandong Province, June 4, 2015. Shandong's summer grain output reached 23.473 billion kilograms this year, up 828 million kilograms from the previous year. Photo: Xinhua 

Farmers harvest crops at Xiaogongshan Village of Dongshahe Town in Tengzhou, esat China' s Shandong Province, June 4, 2015. Shandong's summer grain output reached 23.473 billion kilograms this year, up 828 million kilograms from the previous year. Photo: Xinhua 

Farmers harvest crops at Chengang Village in Tengzhou, esat China' s Shandong Province, June 4, 2015. Shandong's summer grain output reached 23.473 billion kilograms this year, up 828 million kilograms from the previous year. Photo: Xinhua