You can learn lots of things in ASUS. But after several years, you're able to find a better job in other companys. Suggest not working for this company too long, not worth working there over 5 years.
I'd worked for ASUS over 8 years, and now I can earn almost twice yearly salary (180 --> 300+). Not to mention stable monthly salary (stable cash flow) is up to third times more than what I earned in ASUS.