Be careful! I had police visit a school that I worked for in China for the most minute of reasons. For example they were saying that they were looking for a couple of Pakistani immigrants who illegally come into China. Maybe they used reasons like terrorism or something. But in the end it was always about controlling the school and making us intimidated by them. They may have a "we know what's going on but we'll just sit back" type of attitude like a cat toying with a mouse. They may or may not already know about you. Whatever the case save up enough money to get outta there on short notice. Note that this is just a precaution, I'm not trying to make you panic. I hope nothing bad happens to you because of this.