Women feel good when they are with someone superior to them. And they want to be loyal when they think they have a catch. White guys have good luck with Orientals because Orientals view them as superior. The economic factor is most important, but race and perceived superiority of whites matters too.
There's also the fact that healthy Caucasian men (I mean all Caucasians, semites, Iranians, Germans, Indians) are generally bigger, stronger and more masculine than healthy Mongoloid men (Chinese, Japanese, Samoans etc).
When it comes to general behaviour, seen by how they interact with men of their own race, Chinese women are just as hypergamous and prone to disloyalty as any other women. It's their biology. And Chinese culture is communist, and as pro feminist as the West.
Maybe rural Chinese, Taiwanese girls or ROC émigré girls still have a traditional upbringing but the vast majority of urban Chinese girls are not very different in principle to Western girls.