(Note: The worlds in this book are all parallel worlds, and the city and power structures differ from reality, so please don't match them directly to real-life counterparts.)
Shangshu City is a three-dimensional city built against and surrounded by mountains. It's not unusual to see cars driving on rooftops, where the twenty-second floor might look straight across to the first.
You might have just climbed what seems like a rugged trail trodden by forest animals, only to find yourself on someone's rooftop the next moment.
In such a mountain-bound city, there are also old houses built in hidden corners, often overlooked.
They seem to merge with the mountains, appearing less like houses and more like a part of the landscape.
