Mathematics Beijing Normal University Edition. According to the inquiry, official website, a middle school in Yinchuan Beita, learned that the mathematics used by the school is the Beijing Normal University version. Yinchuan Beita Middle School is located in Desheng Industrial Park, Helan County, with the planned Tian Ping Street forest belt in the east, Fenghuang North Street forest belt in the west, Binhe Road in the south and Fumin Road in the north.