You don't have to wait in line or take the shuttle bus. Hold four diamond cards without queuing, go directly to the diamond member channel, and have a special car to pick up and fly; Enjoy free handling fee and priority service. Diamond card is a high-end credit card or savings card jointly launched by bank card organizations and commercial banks. UnionPay cards are subdivided into ordinary cards, gold cards, platinum cards and diamond cards according to card level and service authority.