Black gold credit cards not only represent noble social status, but also provide thoughtful and meticulous financial services. In foreign countries, top-level customer service with credit card as the carrier covers a wide range, laying a billing system for high-end consumption and service. The Bank has deep cooperative relations with world-class hotels, resorts, airlines, restaurants, private clubs, golf clubs and agreement merchants. Black cards can not only cover daily services such as low-end supermarkets, health salons and gas stations, but also cover value-added needs such as entertainment, aviation and tourism. They have also become systematic in customizing services for goblin customers, including booking luxury yachts and private jets. But in contrast, the domestic service scope is relatively small, and the consumption system is not perfect.