Doctor Wangzhab treats a patient in a health center in Pumaqangtang Township of Nagarze County in Shannan City, southwest China's Tibet Autonomous Region, Jan. 14, 2018.

Doctor Wangzhab prepares medicine for patients in a health center in Pumaqangtang Township of Nagarze County in Shannan City, southwest China's Tibet Autonomous Region, Jan. 14, 2018.

Doctor Wangzhab (L) prepares his medical kit and the intern doctor helps him to answer the phone call from a patient in a health center in Pumaqangtang Township of Nagarze County in Shannan City, southwest China's Tibet Autonomous Region, Jan. 14, 2018.

Doctor Wangzhab drives an emergency ambulance in Pumaqangtang Township of Nagarze County in Shannan City, southwest China's Tibet Autonomous Region, Jan. 14, 2018.

Doctor Wangzhab checks a woman in a health center in Pumaqangtang Township of Nagarze County in Shannan City, southwest China's Tibet Autonomous Region, Jan. 14, 2018.