Well, it took a while, but I've finally found something I really dislike about Chinese universities. We have just had the "Golden Week" and now students and teachers go back to work..... on Saturday. We do make up classes for Thursday and Friday only (which makes me wonder what the point of the vacation was). It also means that I can't really teach the next unit, because the structure of SCIC means that when the classes get back in to their big groups of 40 I need them all on the same page.
How it works is you teach a class of 40 once (usually on Monday). They are then divided in to two groups of 20 which you teach the rest of the week. So only half the groups are getting a make up class. In practice what that means is that you do a review class. Not a complete waste of time, but I don't want to work for 90 minutes Sunday morning anymore than the students do, especially because we all kind of know it is pointless.