Legal analysis: the house purchased by the man before marriage is repaid by both husband and wife after marriage. If the property right is registered in the man's name, it belongs to his personal property. After marriage, one spouse participates in paying off the loan, which does not change the nature of the house as personal property. The property rights registered in the names of both parties belong to the joint property of husband and wife.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 1062 The following property acquired by husband and wife during the marriage relationship is the common property of husband and wife and belongs to both husband and wife: (1) wages, bonuses 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; (five) other property that should be owned by * * *. Husband and wife have equal rights to dispose of the same property.

Article 1063 The following property is the personal property of one spouse: (1) the property of one spouse before marriage; (2) Compensation or compensation obtained by one party for personal injury; (3) Property that is determined to belong to only one party in the will or gift contract; (4) Daily necessities used exclusively by one party; (five) other property that should be owned by one party.