The contract stipulated how long the groom had to live with his wife's family, and in most cases required that the first-born son would become the male heir on the mother's side, while subsequent sons would revert to their father's family.
契約中，男方有的終身、有的在一定期限中必須住在女方家中，一般而言所生育的第一個兒子是奉伺女方香煙，其餘再歸男方。