Villagers in Muli town, Gaoqing county build a vegetable greenhouse in spring. [Photo by Zhang Weitang/Xinhua]

Farmers plant trees on the banks of the Yellow River in Qingcheng town, Gaoqing county, Shandong province in springtime. [Photo by Zhang Weitang/Xinhua]

Construction workers repair roads and canals amidst farmland in Muli town, Gaoqing county, Shandong province. [Photo by Zhang Weitang/Xinhua]

Tractors spray pesticide over a large expanse of wheat to help rid it of disease in Gaoqing county, Shandong province. [Photo by Zhang Weitang/Xinhua]