Shuyang County horse factory town with a blacksmith handmade rifle, the New Fourth Army sent against graduated from Jiang Hongying to organize trade unions for iron, new guns. The factory 's geographical position is very special, the nearest Japanese positions only six kilometers, and the military, bandits, bully perplexing forces, in order to defend the iron trade union, Jiang Hongying also organized a branch of the armed forces -- the iron guard, while the organization of production, side and hostile forces struggle.
The blacksmiths in the iron horse factory trade union leadership, using manual methods of dispersive production, no fixed plant, equipment and workers, can produce quality is not inferior to the three eight cover " horse factory made " type seven nine rifle, the Japanese cited as a bugbear, Shuyang County garrison commander Yamaguchi used various means to repeatedly sabotage, raids, was occupied by the factory, and Jiang Hongying, Cui Tiefei led the iron guard with devils guerrilla, after many bouts, paid a great sacrifice, finally the Japanese out of the horse factory.
Due to the victory of Anti-Japanese War, " Ma factory is built" seven nine rifle production more than 7000 branches, in all the Arsenal in second place, made a significant contribution to Anti-Japanese war.