Please provide Non-Immigrant Visas, each valid for at least one year, covering a continuous four-year period counting backward from the application date (no gaps between visas, and the current visa must still be valid).
Non-Immigrant Visas are affixed (stamped) by the Thai Immigration Bureau in the applicant's R.O.C. (Taiwan) passport.
If your passport has been renewed during this period, please also submit your previous R.O.C. (Taiwan) passport.