LHASA, June 15  -- Wang Zhenjiang, Chen Bing and Wang Tongxu are doctors of a medical team from a hospital in Zhuhai, south China's Guangdong Province, who arrived in Tibet in late February. In order to provide sufficient medical services to the villagers, especially elder people with chronic diseases, they have paid regular home visits to the villages despite of the physical burden they need to endure on the plateau.