[2] It was renamed Ōsono Village (大園庄) during Japanese rule, and was part of Tōen District, Shinchiku Prefecture.[4] Dayuan District has an inclining topography from southwest to northwest with an average height of 35 meters above sea level.Inland area are mostly plains, rice fields or spacious flat lands, while in the northeast part is the prolonged sand beach seacoast.The villages are: China Airlines's headquarters, CAL Park, is on the grounds of Taiwan Taoyuan International Airport in Dayuan District.The main commerce industry is retailing business, such as department stores, restaurants, silver-goods shops, furniture, electric appliances, finance, automobiles, motorcycles, gas stations, parking lots etc.