A Chinese doctor (L, front) talks with patients at a hospital in Masacra, Algeria, May 13, 1966. 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/Sun Xingwen)

Chinese medical workers escort a patient to a ward in Freetown, capital of Sierra Leone, Oct. 11, 2014. 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. (Photo by Sun Jie/Xinhua)

Local medical members receive training from a medical team of China's People's Liberation Army (PLA), to fight against Ebola disease at a hospital in Freetown, capital of Sierra Leone, Dec. 10, 2014. 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. (Photo by Dai Xin/ Xinhua)

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)

A medical team conducts an eye surgery for a patient in Halalei, capital of Zimbabwe, Nov. 23, 2010. 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 Ping)

Aerial Photo taken on June 12, 2018 shows the Chinese-aid hospital in Brazzaville, capital of the Republic of Congo. 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/Wang Teng)

File photo shows members of the 21st Chinese medical aid to Tunisia pose for a photo in Sidi Bouzid, Tunisia. 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)

Zewdie Haile (L) and Sisay Haile pose for a photo in front of the tomb of Chinese docotr Mei Gengnian in Jimma, Ethiopia, Aug. 5, 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/Wang Shoubao)

Chu Hailin, a doctor of Chinese medical team, conducts acupuncture treatment for a patient in Windhoek, capital of Namibia, Aug. 5, 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/Zhang Yu)