It's better to invite my mother-in-law or my brother-in-law to join the new family.

Join a new family and put up a couplet. Please invite your mother and uncle. You can invite your mother and brother-in-law to put up couplets when you move into the new house. When you move into a new house, that is, before you eat your first meal, you can post new couplets at the door of the new house to celebrate and express your joy in moving to a new home. All couplets are based on peace and beauty, indicating that you should be healthy, safe, smooth and beautiful when you move into your new home.