- The discounts are applicable for Lunch time all you can eat and A La Carte Menu only. - Cannot be used in conjunction with any other discount or promotion. - For more information please contact the restaurant directly at 0-2254-0404 ext. 4908 - The management reserves the right to amend terms & conditions as necessary without prior notice. FAQs Q: What type of cuisine does Sui Sian @ The Landmark Bangkok offer? A: The restaurant specializes in refined Cantonese and classic Chinese cuisine. Q: What are the must-try menu highlights? A: Peking Duck, Braised Fish Maw with Crab Sauce, and Xiao Long Bao. Q: Is there a dress code? A: Smart casual is recommended to match the hotel dining atmosphere. Q: How do I get to Sui Sian @ The Landmark Bangkok? A: It is located on Level 10 of The Landmark Bangkok, directly connected to BTS Nana.