1. Hi, please don't simply change `building=` to `building:part=` even if this is justified. The entire `building=` (`outline`) needs to be checked and retagged, and the bottom parts changed as well.
2. Podium architecture is standard in HK. When there are multiple towers on a podium, they can be considered different `building=` cartographically. `building:part=` is likely not intended for this situation. When each tower has `building:part=` variation above, the `name=` will fail to be uniquely identifying. 