> Taking into account all the abuse she had to take from them

Some unsolicited advice, because internet: I really hope you understand what you're getting yourself into. I have no idea how familiar you are with Chinese culture, but be aware that family, especially parents, are very important in China. I'm sure you heard the "in China, you're not marrying a person, but a family" thing before. It really is deeply ingrained in Chinese culture, so depending on at which age and for how long she has lived in the West, despite her parents treating her bad, she might still feel a great urge to abide by her parents and pull an emergency bailout.

Even if she decides to cut ties with her family, which might very well happen if you don't pay a dime and make her parents lose face, keep in mind that now you need to be extra sure she is well integrated locally (friends, activities, social life). Again this depends a lot on how westernized she is, if not that much, having Chinese friends is crucial if you're living in an entirely different culture. Just don't let her get all reclusive and spend all time on Chinese social media. This might sound like a joke but I've seen it happen. The culture barrier is real. I've seen Germans struggling to adapt to the American way of living and vice versa, and they're ridiculously close compared to China and any Western country.

Also I hope the way her parents treat her doesn't trigger too much of a protective instinct. It's noble you want to help her but be really sure you know the person and want to stay with her. Breaking up now and sending her back to her parents might make her life miserable, or maybe not and she'll find someone back in China, but marrying her, fucking up her relationship with her parents and then realizing it doesn't work after a year or two will quite likely make her life miserable. (But depending on how ugly it has gotten, you might actually like that at that point).

Again this is general precautionary advice, mostly assuming worst case conditions.