Take a look at old photos. At one time, long hair in China was normal. Respect for the emperor, good citizen, and all that.The video referred to genocidal concentration camps which have now all been debunked by experts and the UN.
Confinement....ah yes...I fondly remembered when I was in the English training camp were joked we were living like in a prison. Guards guarding our compound with barbed wires all around. And military drill instructors to keep us disciplined. Having lived in one, I still looking back think of it as a training camp than a concentration camp. The purpose of the camp was clear, improve our English. But I admit, many of the things we went through would be shocking to the Western world. This is where standards differ.
In my high school, our warden used to stand at the exit of our dorms with a scissors. Boys with long hair were cut right there by the warden as they exit for their classes. This is normal. But whenever I tell this story in the West, this is shocking. Why cant you have the principal or the disciplinary teacher cut the hair of boys who have too long hair as they enter the high school? This is not shocking to me. Having metal detectors, that´s shocking. Its like the adults no longer have any control over the teenagers.
Then Mao created roving bands of violent youth, beating up their elders and cutting their hair.
You have a history of cutting hair in schools, but it wasn’t teachers cutting the hair of students. It was mobs of students cutting the hair of their teachers, and breaking their ribs while they are at it.
Interesting things happened in the gaps in your history books. But you won’t find out about them at a school with barbed wire.