In Shandong urban and rural areas, this way of congratulating the new house is called "warm pot". "Warm pot", also known as "warm house" and "warm house", refers to people who move into a new house and invite relatives and friends to meet in the new house. The invited relatives and friends brought gifts to celebrate, and the host gave a banquet.
New houses are often unoccupied, so there is no "popularity" Inviting relatives and friends to warm the house is said to increase the popularity of the house and dispel the dark and dirty smell in the house (the ancients thought that there would be ghosts living in the house when no one lived, so there was an ominous atmosphere).
Later, this tradition continued. Just like the Chinese New Year, it used to be to exorcise evil spirits, but later it became a tradition, and the origin was not investigated.