The internally bound formaldehyde cannot be removed. The truly effective "formaldehyde removal" should be: release it in advance and discharge it outdoors. That is to say, it should be "sparing" instead of "blocking" or "cutting". For example, photocatalysts are prohibited from being used indoors abroad (blocking: closure is temporary and will be released one day. Cutting: that is, chemical reaction, It is extremely difficult to attach the agent for the reaction, which requires high construction requirements. It is also unstable, has poor timeliness, and has chemical secondary pollution. The emphasis on nano-penetration is more harmful). In the early stages of high volatilization of formaldehyde, benzene, TVOC, etc., scientific methods consistent with their principles are introduced to stimulate their activity, guide their accelerated volatilization, and discharge them outdoors in advance, greatly reducing the total amount to ensure that the remaining The concentration of slowly released formaldehyde can always be within national safety standards. Therefore, the key direction of management is to accelerate volatilization in the early stage. That is to say, as much as possible in the first 3 to 5 years of high volatility can be stripped out and blown outdoors. For example, there is a product called Lintai, which actually helps ventilation and improves ventilation efficiency. It is the right way to quickly solve the problem of indoor pollution.