That's really cool but as you ca imaine I do't use regular stockpiles at all but rather specialised stockpiles :) thanks anyway

@Moss
Here you go:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2100919212

The only thing I don't like about this mod is that stockpiles don't auto flatten. Too ad

大概意思是房子可以建在水里

In case the screenshots are a bit misleading: This mod only makes it so the terrain isn't changed when you place buildings (normally, the game automatically flattens the ground under them).

To actually be able to build on those crazy places, like over rivers and inside mountains, you also need this mod:

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2098940278