Does the construction of public toilets outside the Dongshan wall affect home feng shui?

No, there should be no such thing as a public toilet in Feng Shui, because there was no such thing as a public toilet when Feng Shui was invented. If you still believe in Feng Shui, you'd better not live at the foot of the mountain, because I can tell you that if it breaks out, you can forget all those things, and you can't run anywhere at the foot of the mountain at all. It is natural to choose a toilet that is convenient for people to come and go. It is best to build it outside the wall, because it will be convenient for everyone.