What kind of kung fu is this? Broadcast gymnastics set 9! What does this passage mean? ...

Broadcast gymnastics is a characteristic of primary and secondary schools in China. Children can exercise freely during recess in foreign countries. Only China has broadcast gymnastics, which surprised foreigners. A joke goes like this: Your children in China are really amazing. You have practiced martial arts since childhood, and others don't understand. Looking in the direction pointed by foreigners, the children are doing broadcast gymnastics. Recently, there are many "movements" of broadcast gymnastics all over the country, so there are also many complaints about broadcast gymnastics on the Internet.