A man receives a dose of COVID-19 vaccine at a vaccination site at Shandong No. 3 provincial hospital in Jinan, capital of east China's Shandong Province, on May 8, 2021. To encourage more people to receive COVID-19 vaccination, the health authority in Shandong has upgraded the health codes to the "gilt-edged" version as of May 3, 2021 for all those who have accomplished the vaccination procedure. (Xinhua/Guo Xulei)
