I took the course in Xian that you are talking about here in this post. It was a terrible course taught by a sour person who has been working there for this company way, way too long! The whole mood of the school and company is to look for ways to steal from you, no one Chinese or foreign can tell you the truth of what is going on here. All they want you to do is to be a clown in the class and play games to make the students happy and trick them into thinking that this is learning. There are better places to teach than Aston.