I will pardon your poor English, but more or less I figured what you are trying to ask.
We build our hardware on our own and whatever we can't , we openly say that we are buying stuff from others since we don't have the kind of infrastructure to build them on our own and hence we go for TOT and licensed production. We don't copy stuff from others and claim them to be our own designs !
Yes my dear buddy, you can buy almost any thing you need, but China can't, that the P&W helicopter engine not sold to China is just one example, many things not sell to China, any high technology not transfer to China, China is left in the darkness, and have to copy, to steal, or to buy it the hard way, for example, in the old days, penicillin was on the mils long embargo list, China have to smuggle it through Hong Kong to save Chinese lives. Now the situation little better, we can have some cooperation with France to develop helicopters, China's Z-9 is cooperation with France, now Z-15 is under the way, we learn it one time and another time, then will graduate, just like Japan, Japan buy the west tech for one or two time, then they can make a more advanced version, China not so lucky as Japan, we start very late, and is a commi regime, disliked by almost all, expect the failed ones such Sudan, Zimbabwe, and maybe Pak