Generally, there are three contracting methods: general contracting, subcontracting and independent contracting. General contracting is a contracting method in which the employer and the general contractor sign a construction project contract. Subcontracting is a contracting method in which the general contractor entrusts part of his contracted work to a third party with the consent of the employer. Independent commitment means that the contractor completely relies on his own ability to complete the contracting task without subcontracting.
The general contractor of construction projects may contract some contracted projects to subcontractors with corresponding qualifications; Except for subcontracting agreed in the general contract, it must be approved by the construction unit. In the case of general contracting, the construction of the main structure of the construction project must be completed by the general contracting unit itself. The general contractor of a construction project shall be responsible to the construction unit in accordance with the provisions of the general contract; Subcontractors shall be responsible to the general contractor according to the provisions of the subcontract. The general contractor and subcontractors shall bear joint and several liability to the construction unit for the subcontracted project. It is forbidden for the general contractor to subcontract the project to units that do not have the corresponding qualifications. Subcontractors are prohibited from subcontracting contracted projects.