According to Baidu Wenku query, the method of using airline black gold cards is as follows:

1. Priority boarding: Passengers holding black gold cards can usually enjoy priority boarding rights. , you can enter the cabin early and occupy your ideal seat position.

2. Increased free baggage allowance: Black gold card members usually enjoy a larger free baggage allowance and can carry more baggage or overweight baggage without paying extra fees.

3. Airport VIP lounge: Black gold card members can enjoy airline VIP lounge services for free or at a discount, including comfortable rest areas, free food and drinks, charging equipment, etc.

4. Fast security and border inspection channels: Black gold card members can usually use dedicated fast lanes to complete the security and border inspection processes faster.

5. Other discounts and privileges: Black gold card members may also enjoy other privileges, such as priority ticket purchase, mileage doubling, priority in-flight services, etc.

The black card refers to the American Express Centurion Black Gold Card. The black credit card is called the "King of Cards" by industry insiders.