What are the manufacturers of the level protection inspection toolbox and which one is the best?

Accurately speaking, it should be described as follows: the Ministry of Public Security has listed five companies nationwide, one of which, Beijing Ruian (three companies under the Ministry of Public Security), Jiangsu Guo Rui Xin 'an, Hangzhou Anheng and Beijing Shengborun are all qualified for national sales and designated by the Ministry of Public Security; Several knowledge bases are original knowledge bases provided by the Grade Protection Evaluation Center of the Ministry of Public Security, which have been deepened and improved respectively and have industry standards. All products of Jiangsu Guo Rui Xin 'an and Hangzhou Anheng are independently developed, and these two companies are the best sellers. There is no more accurate answer than me. Hehe, some netizens said that "there are only two companies with real R&D strength". Yes, it is estimated that they are also insiders.