Buying a house loan before marriage, because you are unmarried and single, all loan applications and property rights are handled by one person. After you get married, you get married. According to the property law, the house is your own property, because it was bought for the wedding.
According to the marriage law, because the family income after marriage is still paying the mortgage, then there should be a certain share of the other party. Now, because of the risk, the loan bank requires the loan to be settled before adding people. If you want to write the names of two people, you can only choose to settle the existing loan before applying.