People often mistake the oldest known documentation of something for the origin of something. The oldest skeletons classified as Homo sapiens are estimated 200.000 years old. It is also estimated that Homo sapiens came to China 40.000 years ago. (Sorce: Wiki) I'm fairly certain somebody has figured out joint locks in the 160.000 years beteween. Also gracieacademy.com is not a reference you want to make when discussing history, given the whole family has a somewhat shady reputation.