It covers 2,051.4712 square kilometers, divided into twenty-one towns and villages. As to the contour, the county consists of coast plains in the west, Taichung Basin in the south, and mountainous areas in the east. Main rivers from the north to the south are as follows: Da-an River, Dajia River, and Wu River. The County has a mild climate, with the yearly average temperature of 22.8 degrees Celsius. It also has abundant rainfall, with 2,000 millimeters in mountainous areas and 1,000 to 2,000 millimeters on ground level. Its four seasons feel like spring, extremely good for farming.