Chinese doctors conduct free cataract surgery for a Sudanese patient at the Eye Hospital of Al-Nilain University in Khartoum, Sudan, Dec. 5, 2018. A Chinese medical team of eight members will conduct 250 free surgeries to Sudanese cataract patients at the Eye Hospital of Al-Nilain University in Khartoum, said Chinese Embassy in Sudan on Wednesday. (Xinhua/Mohamed Khidir)