in recent years, with the rapid development of economy, the number of catering and entertainment services in urban areas has increased rapidly, and the resulting oil smoke pollution has increased year by year. In order to strengthen the environmental management of catering industry, prevent and control environmental pollution, protect people's health, and solve the problem of catering industry fume disturbing people from the source, according to the Law of the People's Republic of China on the Prevention and Control of Air Pollution and some other local administrative laws, we have carried out fume control on the main street catering industry in China. It clearly stipulates: "Units and individuals engaged in catering and entertainment services must abide by the following provisions: facilities for absorbing fumes and odors must be installed and discharged through special chimneys, and the discharge height and location of special chimneys shall be determined in accordance with the requirements of" Cooking fume emission standards for catering industry ",which will not affect the normal life of nearby residents." The newly-built catering and entertainment service industry must install oil fume purifier and take anti-noise measures. The original catering and entertainment service industry requires it to be rectified, and the installation of oil fume purifier must pass the monitoring and acceptance. At present, China has completed the installation, monitoring and acceptance of oil fume purification devices in large and medium-sized restaurants on main streets. In the future, China will continue to strictly follow the regulations and earnestly perform its duties, and the work of installing fume purification devices in the catering industry will continue to be carried out, so that the problem of fume disturbing the people in the catering industry can be solved. Since its establishment, Lanying has always been persistent in technological research and development and technological innovation, and achieved user safety satisfaction through high-quality components, new technologies and high service standards. Continuous technological innovation is the philosophy that Hongying people have been adhering to. Products are humanized and standards are globalized, and a series of suitable products are provided for customers to meet their various needs. ?