I think NATO has the right idea. You almost have to use powerpoint or some other sort of visual aid because otherwise 130 students, you're going to lose them fast. Putting up guided activities on a PPT and then calling individual students (although I hate to do that point and -- hey you! method, what else can you do?) to answer, so that they at least get a small chance to speak. Pictures are also an excellent idea. Kids these days love screens and visual stimulation, and really you almost have to approach this like a lecture, but with a few small opportunities for participation thrown in.
Groupwork for a class that large is probably not going to be practical either, since without monitoring, it will devolve into chatter. Even if you split them into massive groups of 10, you'd still have 13 groups to work with, and if you do a more reasonable number, like groups of 5, forget it, that's 26 groups. It will be chaos. You'll have a couple of groups where the kids are dilligently working on whatever they're supposed to be working on, a few who will be lost, and a few who won't care. Will you have Chinese teachers in the classroom with you to help with crowd control? If so, put them to good use. If you do groupwork, then make the Chinese teachers help you go around and monitor the groups and make sure they're staying on task.
The school is, of course, I almost guarantee, going to natter on about how they want the students to all have a chance to practice their spoken English, so if they do say something like that, tell them if they care about the kids' spoken English, to at least break the class into two classes of 60 or so. Even that is large!
Good luck. To be honest, your school is really taking the piss here and I'd have no problems letting them know that. If they want to do it this way, fine, but they shouldn't expect any real language learning to be taking place.