The problem with Chinese is they steal
knowledge, they didn’t develop the
“Backbone” so to speak that Russia and America
has spent billions on and millions of man hours.
Even ESA hasn’t got it right yet.
Just because you can make a machine, doesn’t
mean you know how to use it.
The WWII German program was the fountainhead. The US program is the only legit one, the rest rely on hand-me-downs (USSR to various clients and allies), back engineering (there's a nice shot in "Korolev" of Sergei, in uniform, standing next to a captured V2 engine in 1945), and espionage.
And even the US program had the advantage of having the designer Von Braun and his best associates surrender to US forces.
Thanks to having not only the engineering itself -- captured V2 engines -- but the engineers, the US took the first photos taken from space (1946).
Von Braun's team developed the F1 engine (started in response to the requirements of the h-bomb program) which was finished for NASA (newly created from the predecessor NACA) and ready to go before JFK was in the White House. They also developed the cryofueled upper stages that contributed to the success of the Apollo program.
It didn't hurt to launch from a lower latitude, either, but until the SpaceX superheavy, there's never been a liquid fueled booster like the Saturn V.