Bromine is one important chemical, widely applied to fire retardants, extinguishers, refrigerants, medicine, pesticide, chemical, fertilizer, etc. During the later stage of Japanese-ruled period, Japanese fighters were in need of fuels extracted from either condensed sea water or brine water. Since the raw materials made from brine water mainly supplied by salt evaporation ponds, the military fuel factories were all built around the salt evaporation ponds. In 1939, the joint venture among three corporations, Nippon Soda Corporation, Japan Salt Corporation, and Taiwan Development Corporation invested in a factory in Anping and its branches in other area, too; Beimen Bromine-Making Tower was one of them.