Would be pretty hard to get all that's needed. The metal 3D printer for the engines, capable of printing not just any metal but combustion chamber with one of highest chamber pressures in rocket history. Engine that can be relit at least 3 times and throttled down to 30%, and still provide the needed thrust. Software for guiding the rocket using the grid fins and gimbals of the engines to hit the pad; the precise relighting moment and thrust control to stick the landing (the engines even at the 30% have too much thrust to let the rocket hover, it must brake precisely to stop decelerating at the ground.) Sensors and telemetry systems calibrated to give the measurements needed for that. Logistics and procedures for fast turn-around. Damn complex mathematics to guide the descent precisely to the site without exhausting all the hydraulic liquid. Supercooled LOX infrastructure, plus logistics of fast fueling up so the LOX stays supercooled. Material engineering for the frangible leg inserts. SpaceX lost one booster due to supplier of bolts supplying them made of worse quality steel than usual, so the typical chinesium approach of China's manufacturers won't do, need to establish an entire new QA system to keep materials up to standard. And a good dozen failed landings before they get it right, in a culture where a prototype failure results in heads rolling.
People don't have the appreciation of how vastly different Falcon 9 is from all other launchers. It's only truly revolutionary in a couple respects, but it's simply made different in hundreds of others, and it just won't work if you don't copy them too. The organizational culture of SpaceX and their insane whackjob approach to engineering, more resembling Aperture Science than any aerospace corpo or NASA, are fundamental to their success, and completely incompatible with organizational culture of a dictatorship's government agency. In China a rocket engine blowing up means politbureau's cars taking a dozen of engineers to prison. At SpaceX it means lunch break.
