Hi, Vichai. I mean local citizens which are given senior certificate issued by the gocernment. Shanghai Ocean Aquarium do not emphasis on the sertificate, just saying bring your Id certificate. So, I suggest you bring your Id and passport, ask the office staff when you buy the ticket. Shanghai Expo do have discounts on elder people, no problem for that. No discounts on public transportation and little discounts even if you buy the transportation card. So, if you do not stay long in Shanghai, just pay by cash. Local people showing their special card can take the bus free of charge.