21 mu. According to the official website of Wu 'an No.3 Middle School, Wu 'an No.3 Middle School was founded in May 1998, with a total area of 21 mu and a total construction area of 5, square meters. The school has a teaching building, an experimental building, an office building, a library, a standard 4-meter plastic runway, student apartments, a double-decker restaurant and so on. According to the standards of Shuang Yi, it is equipped with 32 laboratories of physics, chemistry, biology, microcomputer, voice, art and music and multimedia teaching network.