They are both systems designed by the elites to shape the behavior of commoners.
Why do I have to regularly use a credit card to prove that I am credit worthy, so that I can get a bank loan to buy a house?
Whereas you taking a high speed train is not a risk, so blocking that is just punishment.
Also in America your credit score won't affect you from buying things like a plane ticket or even leaving the country. It only affects your line of credit (money borrowed). I'm not convinced the government should be telling you how to spend your money (but that's clearly an opinion).
There's also a lot (A LOT) wrong with the credit system, like the fact that a significant number of Americans (numbers vary from 5% to 25%) have significant errors by one of the 3 major credit agencies. Equifax... I'm not convinced China could do substantially better than us (especially when you add more factors). Even if you reduce that number to 1/1000 (I doubt that good considering other database error levels), that still seems like a big deal if it prevents you from mundane events like taking a train or plane. I wouldn't look at a system that doesn't look good and say "Hey, we should do this, but with more consequences when it fails."
It's like being 20 years old and creating a new startup then wondering why investors don't want to give you any money so you can hire out staff and build a product.
It's not inherently impossible to get a loan with no credit history, just really difficult to do without something else to inspire confidence.
And frankly, considering how easy it is for any Joe to build a decent credit history from just using credit cards I'd say most lenders are actually doing consumers a favor by lending them such vast amounts of money on such a basic premise. I know if it were my money I'd be way more conservative.
I have not heard of the expiration of offences in this system. This social credit system is new an may evolve with time.