A combine harvester works on a wheat field in Changqing, Jinan, east China's Shandong Province, June 14, 2013. Some 140,000 combine harvesters are expected to be used to crop wheat in Shandong during the peak harvest period this month. (Xinhua/Xu Suhui)

　　Farmers load a vehicle with bags of wheat in a field in Changqing, Jinan, east China's Shandong Province, June 14, 2013. Some 140,000 combine harvesters are expected to be used to crop wheat in Shandong during the peak harvest period this month. (Xinhua/Xu Suhui)

　　A combine harvester works on a wheat field in Changqing, Jinan, east China's Shandong Province, June 14, 2013. Some 140,000 combine harvesters are expected to be used to crop wheat in Shandong during the peak harvest period this month. (Xinhua/Xu Suhui)