How many configurations are included in the quotation, and will there be additional items later (general hardcover standard configuration 139, complete installation 169)?
Is the water and electricity prepaid or almost guaranteed (usually prepaid by the contractor, you don't know how much it will cost later)
There is no limit to the number of cabinets (some package companies include 3 meters for basement cabinets and 0/.2 meters for hanging cabinets, and extra diplomatic money is required for the excess).
Does wall leveling include (generally, you will not be told in advance, and you will find the money you want to level when the construction starts).
Whether to sign an environmental protection agreement (here it is clear that the furniture is customized and the whole house is environmentally friendly, not other half packages)
How many years is the warranty for concealed works?
Is there an open and transparent construction acceptance manual?
Avoid the trap of packaging and decoration.