Shanghai Yan 'an Middle School Address:No. Maotai Road111China. Source: This is a public boarding high school in Changning District, Shanghai. Yan 'an Middle School has been rated as a key high school in Shanghai since 1960 and a key demonstration high school in Shanghai since 2005. The school has grades 10 to 12 (grade 3 1 3) and there are 34 classes. Yan 'an Middle School holds a direct entrance examination for outstanding middle school students with fierce competition every year. Students who are directly admitted will form a special temporary class with about 30 to 40 students before the start of the school year. The purpose of this class is to let outstanding students start high school education in advance and provide them with opportunities to participate in international mathematical Olympics and other domestic and international competitions. The school is most famous for its teaching of mathematics (and physics to a certain extent), and has trained many international mathematical Olympic gold medalists. Source.