Does the subject want to ask "Can American Express Marriott and CITIC Marriott be used together?"? Sure. American Express Marriott is a commercial credit card of American Express Marriott, which can be redeemed for all hotels under Marriott Group. CITIC Marriott is a "joint credit card of China CITIC Bank Marriott Travelers", which brings high-quality travel experience and value-added service to China members. They are different companies, and the cards have different uses, so they can be used together without any influence.