US is so poor that president trump constantly attack China. Because China is so rich that they can buy the entire Africa, they can buy the entire existing technology, they can invest into best new talents, they can invest into 5G, 6G, 7G, they can build the best spaceship with all the income they received from tax money.
China spend the income tax they received from new apple iPhone sale to acquire new technology, buy poor country, buy young talents, funding educations, funding new technology. Also income tax from many major US based tech company that operate in China, they all pay tax to China government like an overjoyed lapping puppy.