Compared to the City of Ur, Chaldea is somewhat different. The City of Ur still has a little microgravity. Chaldea, on the other hand, is simply "negligible."
The Prime Deity Star is at least a large celestial body in the Asteroid Belt. The City of Ur was established based on that star.
Chaldea, however, has nothing.
Generally speaking, Space Cities can also rely on rotation to simulate gravity. However, this method is feasible for ordinary Space Cities, but it is absolutely impossible for Neutral City-States in the Asteroid Belt. Those typical Space Cities are meticulously designed, scientifically and reasonably structured, with stress from rotation evenly distributed across materials as much as possible, and key points having advanced electromagnetic field technology to disperse shear forces. But for Neutral City-States in the Asteroid Belt, they are merely cobbled together from the wreckage of warships. Even if they managed to rotate, they'd just fall apart.
