Tian-zhong-yang is a geographical name in Taiwan and it always has been mentioned in the historical documents where wars between government and the rebel occurred. However, not every Tian-zhong-yang indicates the same place. There are five different Tian-zhong-yangs in the local chronicles Zhang-hua-xian-zhi and they are located in different Bao. Nowadays one of the five Tian-zhong-yang has been changed into Tian-zhong town. In 1850, while most houses in Sha-zai-lun town were damaged in the flood, some villagers began to move to Tian-zhong-yang nearby. Consequently, Sha-zai-lun town were damaged again in the flood and then by the fire accident, survived villagers entirely moved to Tian-zhong-yang. Tian-zhong-yang town was prosperous because of the convenient transportation system constructed under the Japanese regime. 1940 onwards Tian-zhong-yang was elevated to Jie, a town degree in local administration, and continued to expand. Generally speaking, Tian-zhong town can be expanded not only because it has got the traffic construction during the Japanese Colonial period but also because it has become the main market place to supply fruits and vegetables for the neighboring villages.