Lin Xiaojun (R), a member of the 29th Chinese medical aid to Zanzibar, and a local doctor conduct a cataract surgery for Issa Khamis Issa in Zanzibar, Tanzania, Aug. 1, 2019. Since 1963, some 220 million patients in 48 African countries have been treated by Chinese medical personnel as of 2018, according to the National Health Commission. Currently, 983 Chinese doctors are providing free medical services in 45 African countries. (Xinhua/Li Yan)