I'm not sure whether the original question in this post is a troll, a joke, or a legitimate misunderstanding. But it might be worth addressing because I have seen the myth promulgated occasionally that all martial arts go back to a single source. Often that source is given as China, occasionally as India.
There is no single historical source of martial arts. Every culture on earth has created its own systems of fighting - with weapons and with unarmed striking and grappling. Sometimes those systems are formalized and documented in writing, other times they are passed down more informally through personal transmission. Sometimes arts continue to be practiced as a cultural heritage after their original combative context is no longer practically relevant. Other times they are lost, modified, or replaced as times change. Usually they will be influenced by the fighting systems of other cultures which are geographic neighbors or which those which have some sort of contact or cultural exchange. But every country, every culture, has its own native martial arts.
China, being a huge country, has a wealth of native martial arts. (These are generally lumped together under the umbrella term of "Kung Fu" or "Wushu" or "CMA", even though they are very diverse and many developed independently from each other.)
There is a familial relationship between CMA and Karate. Certain individuals from Okinawa visited southern China, trained in some form of CMA, brought it home and blended it with native Okinawan systems to form what eventually became known as Okinawan Karate. When Karate spread to the rest of Japan, it was further modified through influence from older Japanese martial traditions. This familial relationship also extends to Tae Kwon Do, which is a child art of Karate, modified by the Korean culture. (The older Korean martial arts had been suppressed and largely lost during the Japanese occupation.)
Kempo is a hybrid art which, depending on the version, can include elements of Chinese, Japanese, Filipino, and Western martial arts.
Other than that, the list given in the original post is entirely inaccurate. Judo, Kali, Arnis, Muay Thai, Boxing, Kenjutsu, Wrestling forms from outside of China, Kickboxing, Jiu-Jitsu, and Western Fencing have no relationship to Chinese martial arts.
Silat (like "Kung Fu") is a blanket term which covers a wide variety of systems which are native to Indonesia. Thanks to cultural exchange and immigration, there may be some systems of Silat which have CMA influences, but for the most part they are quite distinct from the Chinese arts.
Every culture in world history has had their own version of spear fighting. A large percentage have had some version of saber fighting. I'm not aware of any of the systems outside of China being influenced by the Chinese versions.
Of course, even if the myth of martial arts originating in China were true, it would have no bearing on the idea of China conquering the world. Wars of conquest are not settled by who created a martial art first. They are determined by politics, economics, military manufacturing technology, geography, logistics, strategy, tactics, leadership, morale of the populace and the military, and so on. The question of who invented a certain method for punching and kicking doesn't even make it onto the list.
