Implementing existing technology is a lot different than creating it. I can plug a power cord into the outlet to power my computer and use it but I sure as hell couldn't build a computer from scratch or construct a power grid. Using existing technology also allows you to bypass the costly R&D expense. There is really nothing wrong with using existing technology no matter where it came from but in this case some people seem to believe China is leaping ahead of others when it comes to technological innovation. To be fair the US, USSR, France, England, and a few others all benefited from the German technology and scientists seized after WW2. The US actually brought Von Braun to the states to lead their rocket programs and he played a significant role in the first Moon landings while advancing the development of the US ICBM's at the same time. My comment is a response to all those who are claiming that the Chinese lander means they are somehow leaping over the US when it comes to advancing space technology. The same people who use the termination of the shuttle program as an example of disappearing US space programs. The shuttle program ran it's course and provided a wealth of data on space operations as well as provided a test bed for new technologies over the past 25 years. The shuttle program was replaced by the unmanned X-37 space plane which has been conducting orbital ops for the past 3 years and a manned version that holds up to 6 people is already being tested.