A freshman (front) presses her finger onto a painting while registering at the Khoo Teck Puat Gymnasium of the Peking University in Beijing, capital of China on Sept. 1, 2020. As the new school year starts, college students are returning to campus in Beijing under tight epidemic prevention and control measures. (Xinhua/Ren Chao)

A freshman (2nd L) registers at the Khoo Teck Puat Gymnasium of the Peking University in Beijing, capital of China on Sept. 1, 2020. As the new school year starts, college students are returning to campus in Beijing under tight epidemic prevention and control measures. (Xinhua/Ren Chao)

A freshman registers at the Khoo Teck Puat Gymnasium of the Peking University in Beijing, capital of China on Sept. 1, 2020. As the new school year starts, college students are returning to campus in Beijing under tight epidemic prevention and control measures. (Xinhua/Ren Chao)

A freshman (front L) walks with his father in the campus of the Peking University in Beijing, capital of China on Sept. 1, 2020. As the new school year starts, college students are returning to campus in Beijing under tight epidemic prevention and control measures. (Xinhua/Ren Chao)

A freshman (front) walks in the campus of the Peking University in Beijing, capital of China on Sept. 1, 2020. As the new school year starts, college students are returning to campus in Beijing under tight epidemic prevention and control measures. (Xinhua/Ren Chao)

A freshman (1st R) walks with a family member (2nd R) in the campus of the Peking University in Beijing, capital of China on Sept. 1, 2020. As the new school year starts, college students are returning to campus in Beijing under tight epidemic prevention and control measures. (Xinhua/Ren Chao)