Graduates throw their caps in the air as they pose for a group photo during the 2019 commencement ceremony of Tsinghua University held in Beijing, capital of China, July 7, 2019. Over 3,000 graduates attended the ceremony on Sunday. (Xinhua/Ju Huanzong)

Families and friends of the graduates attend the 2019 commencement ceremony of Tsinghua University held in Beijing, capital of China, July 7, 2019. Over 3,000 graduates attended the ceremony on Sunday. (Xinhua/Ju Huanzong)

Graduates take selfies during the 2019 commencement ceremony of Tsinghua University held in Beijing, capital of China, July 7, 2019. Over 3,000 graduates attended the ceremony on Sunday. (Xinhua/Ju Huanzong)