This has something to do with genes, but also with diet. Others eat meat from an early age and have different habits. Good muscles, usually love sports, much more spare time than us, and also take medicine as an assistant. So ordinary China people can't catch up, because they lost at the starting line. Just like running foreigners to learn China Kung Fu, many people can't learn domestic Kung Fu. Hehe, because there is no such content. I hope I can help you.