I’m writing this note to express my appreciation to the class with Xie laoshi. I have been enrolled into advanced level 2 class about one year ago. I really enjoy the class with Ms. Xie. The best part of the class is flexibility. As an expatriate working in Singapore, I travel a lot. I need the Mandarin classes in private and flexible. My teacher does great effort to adjust schedule to meet mine. I also like the textbook materials which is very suitable to my interest.