Walls, buildings, and buildings built against walls, right?
I got a system. It has enough Chinese detail, but is not as fancy as Chinese puzzle kits or aquarium decor. Based on actual buildings in the legations, not on ornate temples and such.
bricks, stone and adobe, with neat roofs, and LOTS of hasty parapets along a variety of walls (some were high walls, others, under 8 feet, with firing holes and cribbing added as support.)
The legation area didn't look a whole lot differwent from old Mehico or In dia during the mutiny, save for the little things.
Battle damage? I would think so, right?
Other than that, mostly a lot of poor hovels, that are kinda universal and generic, with maybe a detail that says "Chinese"?
Tell me, and I will build. :)