A scam that should be highlighted is one to do with the term 'teaching hours' in the appendix to the main contract. Beware that if they specify 'teaching hours' that does not necessarily mean teaching periods/week in their eyes. They may try to interpret it as clock hours, in which case you'll have been scammed.

For example, if you sign up for 18 teaching hours/week, they may expect you to put in 1080 minutes of teaching/week, which, if the class time is 45 minutes/ teaching period, will work out at 24 classes/week. That's a significant difference!

Make sure to ask them what they mean by 'teaching hours' if that's in your appendix. Best to get it clarified at first. Even ask them to change the wording to avoid a subsequent dispute. Appreciate that oral promises may count for nothing in China.

But if they put 'hours of teaching' or 'hours' in the appendix, there's no doubt that it means clock/60-minute hours! So, no problem from your viewpoint!