Pre-evaluation is done in the project after the feasibility study, to be carried out when the project is set up need to be done, also known as the establishment of the evaluation; acceptance evaluation is in the construction project is completed after the Safety Supervisory Bureau of the enterprise project acceptance, to see the implementation of your corrective action measures, the design of safety facilities, etc., whether they are all in accordance with the design of safety facilities in accordance with the special section of the security facilities and set up a safety evaluation report Requirements. Status quo evaluation is the evaluation of the current situation of the enterprise, when can be done generally for hazardous chemical enterprises are to do when the license is renewed.