A Chinese volunteer (left) at the China-Guinea Friendship Hospital in Conakry, capital of Guinea, discusses a patient's condition with local medical professionals. (Photos: China Daily)

Chao Shuang (right), a pediatrician at Beijing Tsinghua Changgung Hospital, holds a child at the China-Guinea Friendship Hospital.

Chen Zhi, a physician who volunteers in his spare time, examines a patient at a hospital in the Dehong Dai and Jingpo autonomous prefecture, Yunnan province, in 2017.

Wu Yongjian (right), a volunteer with the Chinese Academy of Medical Sciences in Beijing, performs a surgery with Pakistani doctors in Lahore.

Xin Hong, gynecologist at the Second Hospital of Hebei Medical University.