Done it before u claim it's easy. US has never done a robotic lunar soil return before. The tech is totally different between manned and unmanned. Why the new rocket thrust supposed to match saturn V failed since US has done it before?SpaceX is American so it counts anyways lol , and double rovers can be easily done by NASA except they don't cause NASA doesn't need to sooo.
NASA has better funding than CNSA therefore will be ahead in certain things only
Critical engine test for NASA's Space Launch System megarocket shuts down earlier than planned | Space
NASA fired up the core stage of its massive new megarocket Saturday (Jan. 16) in a critical test that appeared to shut down early.
Finally, a Chinese scientist is paid how much compare to a US scientist? If u think NASA has more fund and can do more than CNSA then u are wrong.