So for those new flats, let say 4 room. The living and dining is connected together as a rectangle shape and not L-Shape. Rectangle shape maybe better like old flats. If you jump, there is like a very hollow sound and you can like feel there is spring. For old flats wont. I am very scared.

For the whole wall at the living room, if you put a curtain, you need to do bubble leveling. So the curtain is actually very straight according the the nature. Than you notice, how come the ceiling is not level? How come the floor is not level when the curtain is of correct size? Than you imagine if every of the pre fab unit is like that, like trapezium shape, how is the building upright and straight? Sorry I am noob. Nah Nah, its okay again. They try all ways to make it straight? So tiles will fall, building? Investor going to abandon ship after all is build?