Four martyrs' monument is located in the Nankai Middle School Nanhai District Tianjin. It is set up for four martyrs who devoted themselves to national liberation war, they are Tian Wenchun, Zhang Bingyuan, Yue Dai and Wu Zuyi. The plane of tablet is retriangulate sexangle with 2.25m high; All sides of the pedestal of the tablet are engraved record; The frontage of the tablet is the golden characters "Si Lie Shi Ji Nian Bei" by Bao Yibo, and other two surfaces are engraved resumes of four martyrs.