Good math teachers in Houji Middle School in Xuzhou are Liu Ruwen and Zhang. Liu Ruwen, graduated from the Department of Mathematics of Xuzhou Normal University, a senior middle school teacher, a bachelor's degree, a senior middle school teacher, the head of the senior high school mathematics preparation group, and Zhang, male, graduated from 1989 University, working in Houji Middle School, teaching senior high school mathematics and a senior middle school teacher.