QCP is the abbreviation of Quality Control Plan, which refers to the formulation and implementation of a series of quality control measures and management methods to ensure the quality of products or services, including quality standards, time limit for a project plan, supervision and inspection, corrective measures, etc. It is usually a detailed document, including various control measures from raw material procurement to production process, inspection and acceptance, in an effort to reduce inflation, improve environmental protection, energy conservation and emission reduction.