The Orange Line is an East-West line of the Kaohsiung Metro in Kaohsiung, Taiwan. It opened on 14 September 2008, the day of Mid-Autumn Festival, for a week-long free trial service. After the free trial service, the Kaohsiung Metro offered a month-long single one-way promotional NT$15 service on both the Red and the Orange line, with regular ticket price applies after this.