Students prepare to attend the high school entrance exam at No. 8 high school in Beijing July 17, 2020. Beijing started the high school entrance exam on Friday with strict COVID-19 control and prevention measures. More than 77,000 students will take the Beijing High school entrance examination this year. (Photo/China News Service)

Students prepare to attend the high school entrance exam at No. 8 high school in Beijing July 17, 2020. Beijing started the high school entrance exam on Friday with strict COVID-19 control and prevention measures. More than 77,000 students will take the Beijing High school entrance examination this year. (Photo/China News Service)

Students prepare to attend the high school entrance exam at No. 8 high school in Beijing July 17, 2020. Beijing started the high school entrance exam on Friday with strict COVID-19 control and prevention measures. More than 77,000 students will take the Beijing High school entrance examination this year. (Photo/China News Service)

Students queue to get their temperature checked before attending the high school entrance exam at No. 8 high school in Beijing July 17, 2020. Beijing started the high school entrance exam on Friday with strict COVID-19 control and prevention measures. More than 77,000 students will take the Beijing High school entrance examination this year. (Photo/China News Service)

Students queue to get their temperature checked before attending the high school entrance exam at No. 8 high school in Beijing July 17, 2020. Beijing started the high school entrance exam on Friday with strict COVID-19 control and prevention measures. More than 77,000 students will take the Beijing High school entrance examination this year. (Photo/China News Service)