How to understand the main terms of the five-party responsibility system in construction projects

According to the Interim Measures for the Investigation of Quality Lifelong Responsibility of the Project Leader of Five-Party Responsibility in Construction Projects, the five-party responsibility in construction projects refers to the project leader of the construction unit, the project leader of the exploration unit, the project leader of the design unit, the project manager of the construction unit and the chief supervision engineer of the supervision unit who undertake the construction project. Specific responsibilities are as follows: 1. The person in charge of the project of the construction unit shall take full responsibility for the quality of the project, and shall not contract the project illegally or dismember it, and shall not ask the survey, design, construction and supervision units to reduce the quality of the project in violation of laws, regulations and engineering construction standards for any reason, and shall be responsible for the engineering quality accidents or quality problems caused by their illegal or improper behavior. 2. The project leader of the survey and design unit shall ensure that the survey and design documents meet the requirements of laws, regulations and mandatory standards for engineering construction, and shall be responsible for engineering quality accidents or quality problems caused by survey and design. 3. The project manager of the construction unit shall carry out the construction according to the construction drawing design documents and construction technical standards that have passed the examination, and be responsible for the engineering quality accidents or quality problems caused by the construction. 4. The chief supervision engineer of the supervision unit shall supervise according to laws and regulations, relevant technical standards, design documents and project contracts, and assume supervision responsibility for the project quality.