I was working at a kindergarten with 400 kids some time back and the school was raided by the FAP and MOE.
Told the FAP to run away and look for some foreign teachers… saved by my ROC ID Card hehehehehe
The MOE found out that as I only taught 30 minute classes to all 20 kids classes it was ok. The full-time South African teacher who taught the full-time English classes was hiding up on the rooftop. He only had a visitor visa to be in Taiwan. Turns out a competitor school complained about the illegal teachers at our school.
So if your teaching those kindy classes you can be busted.