First, you'll need to understand mental illness is usually incurable. It can be controlled - but similar to addictions - there is no known cure. In order to help your partner, she must first TRULY acknowledge that she actually has a problem, then actually WANT to change.
As @yankee notes - china - to include most of Asia - simply ignores mental illness. They pretend it doesn't exist and try to hide it - especially Japanese - where it's a horrible stigma that becomes attached to your officially recorded family tree history.
I would probably look into the traditional chinese medicine physicians first - but get a referral to someone experienced with mental illness. Dietary changes can sometimes help reduce the effects of anxiety attacks - but you need to be sure she's generally healthy (no glucose or sugar/diabetes related issues, etc). Getting on a healthy diet, shopping, and cooking together (not to mention cleaning up the mess later) is a healthy activity for couples. I'd suggest getting a french cookbook and planning out daily menus together - then having set meals, shopping excursions, etc, but I'd definitely avoid alcohol products of any kind.
Secondly - as her mother also experienced symptoms of mental illness - you can probably guess it's genetic - so you should be aware it's possible to transmit to children - if you both decide to go that route.
You should research the illness and contemporary treatments both yourself and with your partner.
As with HFCAMPO, I strongly advise against western medications except as an extreme measure. Western medications are usually addicting, toxic, have a large variety of side effects, and the body eventually builds up a resistance to these drugs (requiring one to detox or switch to a similar medication - with a brand new set of vast side effects).
I'm NOT a physician - so take that advice as you will - but I would absolutely recommend a lifestyle change (but do it slowly, methodically, and kindly), beginning with a dietary change. Be cautious with meats, cut out breads (basically look into gluten free diets) - no sodas, anything with corn syrup or fructose sweeteners, go organic where possible and definitely no junk food, no BBQ, etc.
Next - put her and yourself into a regular schedule, to include exercise - it can be at a gym or as simple as taking regular walks together. My wife loves long walks together - both alone and with the kids.
Finally - if she gets pregnant - you MAY be in for a whole new episode of crazy - pregnancy significantly changes a woman's body - it can be a calming effect - or it can make her totally irrational and insane - hope you're long-suffering if you're planning on breeding together - especially if the symptoms begin manifesting themselves in your children...now you REALLY can't run away (you could, but you don't strike me as that kind of person).
I had a sweet, beautiful, but crazy insane fiancee. She married someone else - hopefully far more patient, sensitive, and caring than I - dodged that bullet. Your significant other's mood swings will affect you - so if you genuinely want to commit to this woman AND it's reciprocal - you'll also need to learn how to manage her mood swings - and I know of no support groups in China that cater to mental illness. Maybe you can start one under a USA or other country's charter.
You MIGHT consider christian groups - but I'm not a fan of prayer, as I'm not a fan of god(s), deities, and their ilk, either.
I wish you both well and hope you'll both be able to develop a livable, sustainable solution to your partner's disorder and living with it (versus suffering through it). She must be one very incredibly special young lady for you to stick with her for three years. Either that, or you're a clinically self-destructive masochist.
