Ben-gang is a legal intermediary port which traded for rice, sugar and oil. During the Japanese colonial period, Ben-gang was renamed "Pei-kang". In this time, Pei-gang's character of town business had declined rapidly because of the transition of trade and the harbor silt. Even more, Pei-kang's town function had turned into a religious center due to the private railway. Private railway not only brought Ch'ao ti'en temple lots of pilgrims, but it also had a contribution to grow up Pei-kang's religious economy.