I’ve accidentally found another case involving this chain.
In 2008, the “Bokelai” branch hired a foreign teacher and applied for his work permit, but one day before the permit was issued (or one day before the starting date of the permit’s validity if it was issued in advance), an inspector showed up and caught him teaching. He said it was just a demo. He was given 14 days to depart and blacklisted.
The appeal took about nine months, but the government won.