With a history of 338 years, Jingzaijiao Tile paved the Salt Field, the oldest salt field in Taiwan. According to archives, in the Ming Dynasty, Yong-hua Chen, Koxinga’s chief counselor, considered that the salt making techniques employed by the Pingpu Tribe were not good enough to produce good quality salt. Chen therefore improved the old techniques. Chen had broken tiles paved on the salt fields. A king of refined salt was thereby produced. The Salt Field is currently left in the charge of the Southwest Coast National Scenic Area for industrial, cultural and educational uses. Tourists can try making salt on their own here.