First Gen immigrant here. Credit card obtainment is itself not that hard if you already have guardians or sponsors who are willing to cosign your paperworks. If you don’t even have that then it would have been impossible for you to even legally get into this sh*t hole to begin with so I have no idea why you said it was hard.
The hard part is getting a credit line as high as 100k without a stable income and high credit score. Even many US citizens I known don’t even have close to that numbers in all their accounts combined fresh out of college. The conman in the post either already have rich relatives who are paying it back or must have lost even more cash withdrawn from China to bankroll his “scam”
Lastly, regardless of how you spent that money, it’s still entrapped inside the US economy and thus not enrich his own country at all. Unless they bought gold or cash back to China, of course