Guan Yanping (Front) and her colleagues walk on the mountain path in Bingzhongluo Township in Lisu Autonomous Prefecture of Nujiang, southwest China's Yunnan Province, Jan. 13, 2019. In almost two years of working as a volunteer doctor to offer medical assistance in Bingzhongluo Township, Guan Yanping has trekked over 300 times on the steep and narrow mountain paths to treat people in 46 villages. To access some villages without linking of highways, 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. A collection of heartwarming moments in 2019 by Xinhua photographers. (Xinhua/Zhang Jiayang)