Hydilao student ID discount time Monday to Friday 22:00-7:00 you can enjoy 6.9 discount; weekend 22:00 to 00:00 is 8.8 discount, 00:00-7:00 is 6.9 discount. If Haidilao is only a student ID, it cannot be discounted. Haidilao is for college students discounted, and there is no need to show a student ID. You only need to certify college students and receive coupons at Alipay to enjoy discounts.