A worker stores newly-harvested wheat in Boxin Agriculture and Science Ltd. Co., in Zibo, east China's Shandong Province, July 2, 2014. China's summer grain output hit a record high of 136.60 million tonnes in 2014, up 3.6 percent from last year, said the National Bureau of Statistics (NBS) on Monday. (Xinhua/Guo Xulei)
 

Workers air newly-harvested wheat at Fada Flour Mill in Xiajin County, east China's Shandong Province, June 13, 2014. China's summer grain output hit a record high of 136.60 million tonnes in 2014, up 3.6 percent from last year, said the National Bureau of Statistics (NBS) on Monday. (Xinhua/Guo Xulei)

A harvester collects wheat in the field in Shulyu Village of Tangxian County, north China's Hebei Province, June 8, 2014. China's summer grain output hit a record high of 136.60 million tonnes in 2014, up 3.6 percent from last year, said the National Bureau of Statistics (NBS) on Monday. (Xinhua/Zhu Xudong)

A harvester collects wheat in the field in Shulyu Village of Tangxian County, north China's Hebei Province, June 8, 2014. China's summer grain output hit a record high of 136.60 million tonnes in 2014, up 3.6 percent from last year, said the National Bureau of Statistics (NBS) on Monday. (Xinhua/Zhu Xudong)

Harvesters collect wheat in the field in Xiwubo Village of Nanpi County, north China's Hebei Province, June 9, 2014. China's summer grain output hit a record high of 136.60 million tonnes in 2014, up 3.6 percent from last year, said the National Bureau of Statistics (NBS) on Monday. (Xinhua/Mo Yu)

Farmers collect wheat in the field in Shulyu Village of Tangxian County, north China's Hebei Province, June 8, 2014. China's summer grain output hit a record high of 136.60 million tonnes in 2014, up 3.6 percent from last year, said the National Bureau of Statistics (NBS) on Monday. (Xinhua/Zhu Xudong)