Practicing acrobatics, you don't need to elaborate on the hardships-most acrobats in China don't practice in life like Wuqiao (the hometown of acrobatics in China), but practice blindly, which is as bitter as athletes, especially JIU jitsu. As we all know, people's bones are not soft-unless they have rickets, and patients with rickets may not even be able to fold up. Therefore, Jiu Jitsu is trained from the child, because the child's body is not fully developed, and the ligament is not fully developed, and the key to Jiu Jitsu is to break the ligament: this is quite cruel. When practicing jujitsu, it is said that nothing can be moved: without ligaments, the bones seem to lose their coordination and can't exert themselves.