Bank black card is the highest level and treatment. The services and privileges of the black card include, but are not limited to, unlimited use of the VIP lounge in the global airport, global portable WIFI service, free high-end dental cleaning service, global free medical rescue service, free card loss protection and aviation accident insurance, discounts and privileges on hotel and air ticket booking, discounts and privileges on shopping and catering, and personal butler service. The black card is positioned as a top credit card, which is higher than platinum card and gold card. Applying for a black card is often invited. This means that customers can't take the initiative to apply unless invited by the bank. The annual fee of black card is high, but in contrast, black card holders can often enjoy a series of high-value services. Black card refers to a high-end credit card issued by the bank. This kind of card is famous for its special materials, design and excellent service. The most famous black card is Centurion issued by American Express, which is considered as the top product in credit cards and tailored for top customers.