At home, the tortoise is carrying a pillar.

That's not a turtle. What looks like a turtle is called √√√√√√ 873. It's still carrying heavy things on its Bìxì. It can be seen in palaces and ancestral temples all over the country. There are stone pillars and tablets on them, which symbolize auspiciousness and solemnity. Your friends will think of decorating this thing, which is a very traditional thing. I remember that I had this thing when I was studying the history of ancient architecture in college. In geomantic omen, it is said that the town house is used to exorcise evil spirits. Your friend's family should have taken this meaning, hehe.