Guan Yanping (Front) and her colleagues walk on a bridge across the Nujiang River in Bingzhongluo Township in Lisu Autonomous Prefecture of Nujiang, southwest China's Yunnan Province, Jan. 12, 2019. In almost two years of working as an aiding doctor in Bingzhongluo Township, Guan Yanping has trekked over 300 times on the steep, narrow mountain paths to treat people in 46 villages. Because of no highway to access some villages, Guan and her colleagues had to shoulder medical equipment like electrocardiogram and B ultrasound with baskets. For the sake of villagers' health, Guan extended her service period from the original six months to three years. (Xinhua/Zhang Jiayang)