I think it's fine to go ahead,
BUT, make sure you come back ASAP in Aug.
Also, it wouldn't hurt to find out before hand what some secondary essay questions are for all your schools. That way, you can work on them in Taiwan.
In addition, most schools now post their secondaries on the web. Will you have internet access?
You want to be in the country around secondaries time though. Because AFTER you turn em in, that's when the Sh*! hits the fan and you get interviews, and you kiss up to the admissions people, and your secondaries get lost, and the school never received your transcripts, ... bla bla bla...and the list goes on...