First, look at the business license of the enterprise.

    Relevant national laws and regulations stipulate that all companies and individuals engaged in the air purification industry must be reflected in the business scope of their business license, otherwise they are not allowed to engage in this work.

    Second, look at whether the construction personnel have the qualifications for governance.

    Since 2005, the state has organized experts and scholars in indoor environment and disease prevention and control to conduct systematic and comprehensive pre-job training and assessment for air treatment construction personnel. The assessment items include the theory and practice of indoor pollution control, and the use and evaluation of various analytical instruments. For those who pass the grades, a manager qualification certificate issued by the Ministry of Labor (now renamed the Ministry of Human Resources and Social Security) will be issued. This certificate is divided into elementary and intermediate (no senior and engineer said), possessing this certificate is the country's basic requirements for construction personnel in the air treatment industry. This certificate can be verified on the website of the Ministry of Human Resources and Social Security of China. This certificate represents the professional qualifications of construction personnel. Especially when chemical treatment of construction objects, the effectiveness of the product analysis and the determination of product residues will directly affect the treatment effect. If not handled properly, it may cause secondary pollution. Therefore, the theoretical guiding role of this industry is much more important than practical experience in many cases.

    Third, look at testing.

    Governing a company mainly relies on governance to obtain profits. Therefore, in testing, it often saves costs and then attracts people with low-cost testing. Some companies even conduct free testing. I would like to remind everyone that the purity of the test reagents will directly affect the effectiveness of the test. Compared with ordinary reagents, reagents with higher purity have a larger price difference. Therefore, the act of free testing is not desirable, and there is no free lunch in the world. Of course, with the exception of some companies that charge back money. There are two types of testing prices. One is the testing performed by the metrological certification department. More than three points must be selected. The single-point charge is about 200 to 500 yuan, which is mainly used for the determination of commercial disputes. This kind of behavior generally occurs in the later stages of commercial disputes, and all three parties must be present, and the test results are used as the basis for the final ruling. It is rarely used by individuals. The other is the detection of company behavior, that is, the governance company completes the entire process of detection by itself. This requires the governance company to have a high sense of responsibility in testing. Based on the principle of seeking truth from facts, we will do a good job of testing for customers. At the same time, it also serves as an important guiding basis for project management.

    Fourth, look at word of mouth.

    Ask if anyone around you has been in contact with this industry or has done governance at home. Generally, newly renovated houses and offices are more likely to exceed the standard. However, bamboo charcoal and green plants often fail to achieve a good purification effect. This makes people turn to corporate governance. Good governance companies generally have relatively high quality service personnel onsite, and they have a good reputation among the people (bad reviews of malicious online competition are not counted). Today, when it is very easy to promote and build a website, the public reputation is even more important.