Western Taiwan and Fujien are separated by the Taiwan Strait. In light of both warm and cool currents, it has become an excellent fishing area with abundant aquatic animals. The Taiwan Strait has been a place frequented by merchant ships and fishermen since the late Ming dynasty. Kaohsiung, one of the then important fishing areas, has a plentiful catch of Common Mullet from December to January every year. More and more Mainland seasonal immigrants are coming to Kaohsiung and due to the fishermen's frequent visits between the Mainland and Kaohsiung, they have learned a great deal about the geography of Kaohsiung, so there is an increasing number of businessmen and farmers.