East 12 teaching is the building next to Xuesi Building, which is the small building sandwiched between Xuesi Building and Jingsi Building in the east. The circle is really not a circle, just look for it as I say. Nowadays, few people say that the East teaches a few and the West teaches a few. Most people don't know. There may be a sign at the entrance of the building. When you enter the building, there will be classrooms in the building. I hope it helps you.