Legal analysis: if the woman knows about the man's credit card, for the bank, the woman needs to return the amount spent by the man on her credit card. After returning the credit card, the woman can claim compensation from the man. If the man is unwilling to repay, the woman can sue for repayment at the domicile or habitual residence of the man.

Legal basis: Article 1062 of the Civil Code of People's Republic of China (PRC), the following property acquired by husband and wife during the marriage relationship is the joint property of husband and wife: (1) salary, bonus and labor remuneration; (2) Income from production, operation and investment; (3) Income from intellectual property rights; (4) Inherited or donated property, except as provided for in Item 3 of Article 1063 of this Law; (5) Other property that should be jointly owned. Husband and wife have equal rights in dealing with common property.