Examinees from the COVID-19 epidemic medium-risk area receive their masks at an exam site of a high school in Guangzhou, capital of south China's Guangdong Province, June 7, 2021. China's annual college entrance exam, better known as the Gaokao, kicked off Monday morning with a record 10.78 million candidates signing up for perhaps the world's most grueling test. (Xinhua/Liu Dawei)
