People line up for COVID-19 vaccination in Feixi, Hefei(1/5)

People line up in an orderly manner for COVID-19 vaccination at a vaccination site in the Olympic Sports Center in Shushan District of Hefei City, Anhui Province, May 14, 2021. (Photo/Zhang Yazi)

Health authorities in East China's Anhui Province have confirmed three locally transmitted cases of COVID-19 and classified three areas as medium-risk for infection as of Friday morning. All vaccination sites in Hefei have fully prepared and in an orderly manner.

People line up in an orderly manner for COVID-19 vaccination at a vaccination site in the Olympic Sports Center in Shushan District of Hefei City, Anhui Province, May 14, 2021. (Photo/Zhang Yazi)

People line up in an orderly manner for COVID-19 vaccination at a vaccination site in the Olympic Sports Center in Shushan District of Hefei City, Anhui Province, May 14, 2021. (Photo/Zhang Yazi)

Citizens who have been vaccinated walk out of the vaccination site in the Olympic Sports Center in Shushan District of Hefei City, Anhui Province, May 14, 2021. (Photo/Zhang Yazi)

People line up in an orderly manner for COVID-19 vaccination at a vaccination site in the Olympic Sports Center in Shushan District of Hefei City, Anhui Province, May 14, 2021. (Photo/Zhang Yazi)