The slogan wall of the old house in the sixties and seventies

If it is a house in the past ten years, it is generally ok, because the houses in the past ten years are generally frame structures, and the toilets are built behind the wall, which is not load-bearing and can be knocked at will!

If the age is long, it may be upside down, that is, the concrete that is shuttered after the wall is built, it is a whole, so you can't knock it casually, which will affect the bearing capacity!

You can go to the property to see if there are any drawings. There should be both. Just look at the drawings!