Even the ones driving 15 year old Chryslers likely have wealthy parents. University is absurdly expensive for international students of no particular note. On the order of $100k/yr in tuition for a no-name state school.
What's another $50k when you're spending half a million dollars to educate your kid?
I don't think that's an accurate representation of what the estimates are at the link. In particular, the linked page lists undergraduate tuition and fees at $45014/academic year, living expenses at $2100/month (x9 months, leading to $18900/academic year) totaling to $63914 combined tuition+fees+estimated living expenses.
The other reply has clarified that state schools don't cost that much. But just to add on, a lot of international students are merely upper-middle class in their own countries (i.e. family has 1 non-luxury car, lives in a 2 bedroom apartment, takes 1 international vacation every 3-5 years). They take out student loans just like American students and count on paid internships and post-completion Optional Practical Training jobs to pay off those loans. While they're studying they tend to live very frugally - no cars, very little eating out or partying, sharing rooms etc.
Universities can be expensive, but community colleges typically aren’t. Most of the fuerdai in community colleges are probably studying English to get into a university. Even though they are rich, they won’t turn down a good deal when they can get one (and since luxury cars are so much cheaper in the USA than China, they are considered good deals as well).
One of the services my company in Shanghai provides is review and final edit of applications, sometimes as a second check against what domestic (read non-native speaker) agencies have created. CC is seen as a stepping stone to 4 year degree schools. Usually it is rich kids who had no chance or inclination to pass the Chinese university entrance exam. Also many are told by the said agencies, it is the fast track to US citizenship. Most parents want a foothold in other countries as backup plan to get capital and themselves out of the PRC over time.
What's another $50k when you're spending half a million dollars to educate your kid?