The duration of the use of each ANA 優惠碼 is not exactly the same, some are longer, some are only for short-term use. Don't worry about the valid use time of each ANA 折扣碼 since it will be clearly marked at the bottom of the 優惠碼. You can see more detailed information about different ANA 優惠折扣碼 in hkpromocodes.org.