The expenses include: fixed metering fee, project sewage charge, social security fee (old-age insurance premium, medical insurance premium and unemployment insurance premium), housing accumulation fund and hazardous operation accident insurance premium.
Bidding is not standardized
First of all, both parties have violated the bidding procedures. Some employers resort to deceit in bidding for construction projects, and adopt the method of inviting tenders for construction projects that should be publicly tendered, excluding potential bidders; In order to cope with the strength and pressure of the employer, some construction enterprises take unfair competition measures in project bidding and conduct bidding activities.