What grade does Beijing 10 1 middle school belong to?

This school belongs to an advanced class.

Beijing 10 1 Middle School is a key middle school in Beijing and a model high school in Beijing. The school was established in 1946 with a long history and profound cultural background. The school is located in the site of Yuanmingyuan, Haidian District, Beijing, with Tsinghua University in the east and Peking University in the south. There are abundant teachers, including national model workers in the education system, national excellent teachers, Beijing model workers, and winners of the May 1st Labor Medal in the capital. So the school is classified as a high-level school.