However, it's always seemed fair to me for all assets gained by both partners from the point of marriage to be split 50:50.
In many U.S. states this is the gist of the law, assuming(!) no children, business entanglements or pre/post-nuptial legal agreements are in effect.
As California is a popular destination point for many Taiwanese, if she is located there she will find the "laws" very favorable to her if a "No-Fault" divorce is pursued.
As I see it, which is always subject to correction, the main problem is two-fold:
1 - She is in the USA and her soon-to-be ex-spouse is in Hong Kong. This is going to be a big stumbling block and make enforcement of any proceeding very difficult no matter how this is adjudged.
2. She is dealing with a legal professional. This means she needs a similar counter-part on her side.
Juliana_ping, get as much good, solid legal advice ASAP!
You might also consider whether it is better for you (and children if any are involved) to move back to Taiwan for the proceedings.
Also, if children are involved, please think of how any actions and words spoken by by both if you during this will possibly affect them as they grow up.
Remember - He is the legal pro...You are not. Don't ask for more than you are due - But try for a disposition that You will not regret in the future.
...and forget any concepts of "Fair." Equitable is what should want. Look it up in a legal context.
And use any "internet advice" as a starting point...Not a final solution.
Best Luck to All involved.