A headmaster treating foreign teachers like that is wrong. Foreign (adult) teachers are not like his immature students that he can push around and force to "obey". In that case, he may have more foreign teachers obeying their good nose who would do a midnight runner.
Hi, Bill, will you be there and show them the way in the darkness? --- What, you won't? Now, I can at least understand why nobody likes you. Good bye, Billie Boy, and please don't forget to feed your aliens at schnool who will take over after foreign teachers have done their midnight run. Yes, and aliens are so much cheaper. And there are indeed cheap headmasters, too. I know where I can buy one for 1.5 kuai!....hoorahhhhh!