Aier has been running a school for 10 years, and has invited teachers to give lectures abroad, as well as international students. Needless to say, this popularity and level. The teacher's teaching level is very high, and the requirements for students are also very high, but it is a bit harsh, which may be unbearable for many people. I really didn't understand when I was studying there. I understand the teacher's painstaking efforts to open his own shop over the years.