How to upgrade the Puka silver card of Berman Hotel

Register through the network channel or fill in the information at the front desk of the hotel, and you can become a Puka member of Dongcheng Association. ② Through online or offline purchase, you can become a member of China-ASEAN Expo with silver card, gold card and black card. ③ Dongcheng members with black gold cards can book directly through Dongcheng's own channels or hotels, and my card will be upgraded to a diamond card member after staying for one night. ④ A member with a black gold card can be upgraded to a diamond card member by spending a certain amount.