It means family harmony and peaceful reunion. It describes the beautiful state in which everyone in the family is healthy and living in harmony. It can also be used to wish relatives and friends a safe reunion on important festivals or special occasions. The origin of this idiom can be traced back to the "Reunion Festival" in ancient China. This festival was established to celebrate the Lantern Festival on the 15th day of the first lunar month. It is also a festival for family reunions and the enjoyment of reunion mooncakes. With the passage of time, "safe reunion" has gradually become a good wish and spiritual pursuit in people's daily lives, emphasizing the importance of family harmony, peaceful coexistence, and mutual love.