Hui Lau Shan: Buy 1 Free 1 Promotion 許留山: 2015年2月23日起, 至3月31日, 列印下列優惠券, 你就可以立即享受買一送一優惠 Hui Lau Shan is having a Buy 1 Free 1 Promotion. Simply print out the coupon and visit you nearest Hui Lau Shan store now to enjoy this great deal.