This blog post is directed to foreign corporates, and it covers the kind of thinking you should have going into any legal dispute
http://www.winklerpartners.com/?p=8952
Here is the website for the Legal Aid Foundation, where you can seek legal advice before engaging a lawyer
https://www.laf.org.tw/en/index.php?action=faq&Sn=130
You should be able to find a Taiwanese private practice attorney (i.e., with their own practice, so less overhead than a firm) who you might consult. Will ask around as well.
200k may not be worth your time if this proceeds – as others have said, try to explore a negotiated settlement (offer to get back less). From my own experience, if it gets to court, you will wind up needing multiple hearings to get even the simplest things resolved, and hearings are scheduled weeks/months apart. THAT alone will infuriate you