Yang Hongliang tells origin of wheelbarrow to pupils in a museum at Baitajie Village, Hedong District, Linyin City, east China's Shandong Province, Oct. 24, 2015. Yang Hongliang, a farmer in Baitajie Village, invested two million yuan (315,000 US dollars) in building the museum in his village in 2007. (Xinhua/Song Haicun)
