Tenders need to China Security Products Industry Association (referred to as China Security Association) issued by the security qualification certificate. Security qualification mainly refers to the engineering qualification of security engineering. Security qualification application and standards are based on the situation and requirements of the development of the security industry, by the China Security Products Industry Association (hereinafter referred to as CPSIA) in the form of industry self-regulation launched one of the main documents of the security engineering enterprise qualification evaluation system. Security engineering enterprise qualification is divided into three levels: level one, level two, level three. The third level is the lowest level. Enterprise qualification assessment of the implementation of the principle of promotion level by level.