A medical worker checks people's medical history for COVID-19 vaccination at a hospital in Yuexiu District of Guangzhou, south China's Guangdong Province, April 15, 2021. Guangdong Province started administering COVID-19 vaccines to foreigners in the province on April 15 on a voluntary basis. Photo:Xinhua

Foreign nationals who are covered by the local health insurance program can be vaccinated for free, enjoying the same policy as insured Chinese citizens, and those not covered will be charged 100 yuan (about 15 U.S. dollars) per dose.Photo:Xinhua

A Tunisian national (1st, R) registers for COVID-19 vaccination at a hospital in Yuexiu District of Guangzhou, south China's Guangdong Province, April 15, 2021. Photo:Xinhua

A Chilean national (L) receives a dose of COVID-19 vaccine at a hospital in Yuexiu District of Guangzhou, south China's Guangdong Province, April 15, 2021.Photo:Xinhua

A Tunisian national receives a dose of COVID-19 vaccine at a hospital in Yuexiu District of Guangzhou, south China's Guangdong Province, April 15, 2021.Photo:Xinhua

A Ukrainian national (1st, R) registers for COVID-19 vaccination at a hospital in Yuexiu District of Guangzhou, south China's Guangdong Province, April 15, 2021.Photo:Xinhua

A Russian national (1st, R) registers for COVID-19 vaccination at a hospital in Yuexiu District of Guangzhou, south China's Guangdong Province, April 15, 2021.Photo:Xinhua