A Sudanese student studies in the candle light to prepare for the high school certificate examinations in the Sudanese capital of Khartoum, on June 25, 2021.(Photo: Xinhua)
A Sudanese student prepares for high school certificate examinations in the candle light during a power outage in Khartoum, Sudan, on June 25, 2021.(Photo: Xinhua)
A group of Sudanese students prepare for the high school certificate examinations in the candle light during a power outage in Khartoum, Sudan, on June 25, 2021.(Photo: Xinhua)
A group of Sudanese students prepare for the high school certificate examinations in the candle light during a power outage in Khartoum, Sudan, on June 25, 2021.(Photo: Xinhua)