Villager Hu Yongzhang cleans the solar panel on the roof of his house in Zouping County, east China's Shandong Province, Dec. 24, 2017. The photovoltaic power generation system brought him a salary of 15,000 yuan (2,288 U.S. dollars) each year. Zouping County has set a special fund to boost the development of rural area. Up till now, the county has completed the construction of 65 provincial and municipal model villages and 207 improved villages.(Xinhua/Dong Naide)