Be sure it is full of techniques that you can apply to grossly proficiency varied and large classes. Tell your trainers you are going to China and tell them this is what you will be working with. If you come to university, you will. The students will enjoy you if you have the ability to entertain them while they deal with this crazy situation. As a guest you are expected to bring something useful for your students, not to push the department to change the way they do things.
Some foreign teachers find ways to have a good experience with their classes.
It can take enormous creativity. Get all the practical help and resources you can from people who have had successes teaching in China before you come because once you are here both are hard to find. Christians, consider joining a Christian organization sending teachers to China. They pool their successes and it is a great resource to have God in your admin. The certificate will help you have a good time here I think.