Well then the problem is you have deleted the upper level of Chater Garden, and casually snapped the MTR exit to the corner unrealistically. The `=tunnel` section is not represented by the `building=` , and it would be the 1st step to make it routable. If you don't have time, don't want to, or don't know what to do, leave it alone. Don't simply delete things, and flunk it. 