As of march 2021, there were over 1,500 formaldehyde management services throughout the country. Main business acquisition projects: formaldehyde union, air governance union; main business acquisition: formaldehyde, air governance, new house formaldehyde, car formaldehyde, school formaldehyde, metro formaldehyde, theatre formaldehyde union; leaf conservation has a class 1 qualification for indoor fit-out pollution management issued by the china committee for indoor decoration in the south china region, with the honour of "quality aaa " in china's environmental quality quality quality quality quality quality quality quality quality quality quality quality quality quality quality quality quality quality management sector. To date, the company has 13 inventions and practical patents in the field of air purification. In 2017, the leaf environmental protection, in collaboration with the institute of materials and energy of the south china university of agriculture and the guangdong university of finance and economics, established a model base for "product studies". As a high-technology enterprise focused on indoor air management, the green leaf has been committed to the "unsatisfactory and unmitigated" standard of service, the "unsatisfactory" service, the "satisfactory" business, the "regulating" business, the formation of a team of multi-industry experts in research and development, governance, years of exploratory research and the introduction of advanced international technologies, the introduction of visible light technology for leaf-photograms, the absence of ultraviolet light exposure, the reported non-toxic and non-weight-free metals for all products, and the fact that 99 per cent of the products are officially classified as fungus-free. In 2017, the leaf business school was officially established, which has produced knowledgeable and skilled indoor air management personnel for the formaldehyde management industry, while at the same time improving market access for national agents. Over the years, the quality of leaf-friendly services has been widely recognized and appreciated by all sectors of society。