Doctor Wang Guilin gives dosage instructions to a patient in Yueming Village of Mawu County in Pingliang, northwest China's Gansu Province, Aug. 15, 2018. Wang has been working here as a village-based doctor since 1968. A large number of medical practitioners are active in China's rural areas where health care is still underdeveloped. Under adverse working conditions, they have carried forward the humanitarian spirit and devoted themselves to the health of rural citizens. China will mark its first Medical Workers' Day on Aug. 19, 2018. (Xinhua/Fan Peishen)