A Sudanese herder shepherds his goats as they graze on the bank of the White Nile in Khartoum, Sudan, Jan. 14, 2019. (Xinhua/Mohamed Khidir)

A Sudanese fisherman casts a net in the White Nile in Khartoum, Sudan, Jan. 14, 2019. (Xinhua/Mohamed Khidir)

A Sudanese herder shepherds his goats as they graze on the bank of the White Nile in Khartoum, Sudan, Jan. 14, 2019. (Xinhua/Mohamed Khidir)

A Sudanese fisherman catches fish in the White Nile in Khartoum, Sudan, Jan. 14, 2019. (Xinhua/Mohamed Khidir)