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The Beimen bromine brick tower, a wartime military factory for producing bromine, utilized bromine, a crucial chemical raw material, which was widely applied in flame retardants, fire extinguishers, refrigerants, medicine, pesticides, chemical fertilizers, and more. During wartime, the Japanese colonial empire needed bromine for the explosive agent in military aircraft fuel. This was obtained by extracting it from concentrated seawater or brine from salt fields. Since the production of raw materials came from the brine produced by salt fields, similar munitions factories were built near salt fields. In 1939, three companies, Japan Soda, Japan Salt Industry, and Taiwan Colonial Development, merged to form the "South Japan Chemical Industry Co., Ltd." in Kaohsiung. They established the Anping Factory in Tainan and set up branch factories in Budai, Beimen, and other places. The Beimen bromine brick tower was one of them. The Beimen bromine extraction tower was primarily constructed with cement, wood, bricks, and iron sheeting. After the war, the iron sheeting and wood were removed by locals, leaving only the "three-in-one, plus one" red brick high tower that can still be seen today. According to local elderly accounts, the brine source came from areas near Zhongzhou and Jingzijiao, Beimen (at the time, the Beimen salt field included Oaliao, Wangyeahgang, Jingzijiao, Beimen, and Zhongzhou). Bamboo pipes were used to transport the salt brine to produce bromine. Currently, located beside Highway 17, the Beimen bromine brick tower covers an area of about several hundred square meters. Although its appearance has gradually deteriorated, it still testifies to the significant role it played in the past.