I dont know if you are serious or not, but J20 and Mars landing is nothing in comparison to fusion.
Its almost an insult to compare these 2 "easy" things with fusion.
And this doesn't apply only for China but to the rest of the world.
The world is 30-40 years away from fusion
"Muh j20 so cool!" Lol
Hahaha, hey make it cool century while you're at it, not just 30 or 40yr, nice round number. LOL.