Tsinghua graduates serve as volunteers for epidemic prevention and control on campus. [Photo/Zhang Jiaqi]
Volunteers pose for a photo. [Photo/Zhang Jiaqi]
Volunteers flash a thumbs-up sign while posing for a photo. [Photo/Zhang Jiaqi]
Volunteers register the personal information of the students taking nucleic acid tests. [Photo/Zhang Jiaqi]
Editor: Li Han
