The credit card customer service hotline is 4008205555. Overseas, you can call 862 1-38784800 or 86-4008205555. After verification, the cardholder selects "9" to switch to manual service. Customers who do not hold a card choose "3#→ 1→3". Tips: 1, please call the VIP line for diamond cards and platinum cards: 400-888-5555. 2. If you need a business card, please call the service hotline: 400-820-5558.