Documents that show your marriage is legitimate, for example, bank statements, mortgage, lease agreements, tax returns, birth certificates of your children.
证明你的婚姻合法的材料，例如银行存款证明，房产等抵押或租赁协议，交税证明，孩子的出生证明。
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As another example, the date of birth may be defaulted to an actual legitimate date such as January 1 of the current year.