You can refer to Article 7 of Judicial Interpretation of Marriage Law of the Supreme People's Court, which stipulates that "if a property purchased by a husband and wife for their children after marriage is registered in the name of the investor's children, it can be regarded as a gift to only one of their children according to Article 18 (3) of the Marriage Law, and the property should be recognized as the personal property of the husband and wife."
From the source of the property, it is the income from the replacement of the old house after the demolition of one parent before marriage, and the demolition and replacement is a reciprocal transaction from the perspective of civil law. According to this judicial interpretation, no matter whether the property is registered under the name of one parent or the name of the investor's children, it does not belong to the joint property of husband and wife. Registration in the name of one parent is the property of others, and registration in the name of the investor's child is regarded as a gift from the investor to one parent's child.