"Project four complete" usually refers to the business license, organization code certificate, tax registration certificate and social security registration certificate all four documents complete. These four documents are the legal documents that enterprises must have in the process of registration and operation, but also an important proof of the legitimacy of the enterprise.
Business license is the proof of the enterprise's legal personality; organization code certificate is the proof of the enterprise's organization and management level; tax registration certificate is the proof of the enterprise's identity as a taxpayer; social security registration certificate is the proof of the enterprise's payment of social security for the employees in accordance with the law. Only these four documents are complete and valid, the enterprise can carry out business activities in accordance with the law.