Graduates attend the commencement ceremony of the Peking University Health Science Center (PKUHSC) in Beijing, capital of China, June 29, 2020. A total of 2,094 students graduated from the center this year. (Xinhua/Zhang Yuwei)

Medical workers who have been in Wuhan to aid the coronavirus control efforts attend the commencement ceremony of the Peking University Health Science Center (PKUHSC) in Beijing, capital of China, June 29, 2020. A total of 2,094 students graduated from the center this year. (Xinhua/Zhang Yuwei)

Graduates celebrate their graduation after the commencement ceremony of the Peking University Health Science Center (PKUHSC) in Beijing, capital of China, June 29, 2020. A total of 2,094 students graduated from the center this year. (Xinhua/Zhang Yuwei)

Graduates take photos after the commencement ceremony of the Peking University Health Science Center (PKUHSC) in Beijing, capital of China, June 29, 2020. A total of 2,094 students graduated from the center this year. (Xinhua/Zhang Yuwei)

Graduates take photos after the commencement ceremony of the Peking University Health Science Center (PKUHSC) in Beijing, capital of China, June 29, 2020. A total of 2,094 students graduated from the center this year. (Xinhua/Zhang Yuwei)

Qiao Jie, executive vice director of the Peking University Health Science Center (PKUHSC), speaks during the commencement ceremony of PKUHSC in Beijing, capital of China, June 29, 2020. A total of 2,094 students graduated from the center this year. (Xinhua/Zhang Yuwei)

Graduates pose for photos after the commencement ceremony of the Peking University Health Science Center (PKUHSC) in Beijing, capital of China, June 29, 2020. A total of 2,094 students graduated from the center this year. (Xinhua/Zhang Yuwei)