Energetic music fills the air as students move their arms and dance along to do aerobic exercises (有氧体操). This semester, students at the Aerospace City School of RDFZ in Beijing have more fun activities. 

"Students have different physical conditions after recovering from the Disease, " Wang Lifang, a PE teacher at the school, told a local TV station. "So we start from easier activities such as dancing, fun games and sit-ups to gradually improve students' physical health. "

The PE teachers designed a series of aerobic exercises, which can train students' core (核心), upper body and leg strength. To make sure everyone is safe, the school also uses wearable devices to keep track of students' heart rates during exercises.

"The music is happy and relaxing, and we all enjoy this kind of fun PE class, "said eighth-grader Tu Yahan.

At Taipingchuan No. 1 Middle School in Jilin, students began to do Tai Chi instead of running during the morning break. "I like doing Tai Chi because it won't make you out of breath. I think it's good for students who are still coughing these days, "said Liu Jiawei from the school.

But this doesn't mean that students will not do other regular sports anymore. According to Wang, the PE teachers will keep changing training plans based on students' conditions and gradually go back to normal teaching content. "During this special period of time, it's even more important to let students realize the value of sports and develop healthy exercise habits, " said Wang.