Tianjin Huisen Electromechanical Factory is engaged in the manufacturing of chemical machinery and has an independent and complete research and development and manufacturing system. Since its establishment in 1994, we have made contributions to various industries in society with unique technology, value for money quality, and a work style that strives for perfection. In the mid-1990s, our medical oxygen purification equipment won the Science and Technology Progress Award. The magnetic transmission leak free gas compressor developed in 2000 has obtained two utility model patents. This achievement has not only played a huge role in hydrogen cooling generator sets - hydrogen circulation drying and purification equipment in power plants, but is also widely used in closed cycle hydrogen systems for sintering furnaces in industries such as metallurgy and electronics. Since 2002, we have moved towards the field of digital automatic welding and have successively developed pipe pipe automatic welding equipment and pipe plate automatic welding equipment. And it has driven the production of stainless steel vacuum corrugated pipes and stainless steel metal hoses, ensuring welding quality and improving product service life. We have developed high-pressure gas purification equipment while developing old products (medium and low-pressure gases - hydrogen, oxygen, nitrogen, argon) purification equipment, and have achieved rapid development. In practical applications, it not only saves materials and reduces consumption in equipment manufacturing and low-cost operation in use, but most importantly, it is easy to obtain high-tech performance indicators in the purification process, which is difficult to achieve with low-pressure gas purification technology. Therefore, it is applied to higher end fields such as microelectronics, optical fibers, and purification of materials in the aerospace industry. While developing high-end gas purification equipment, we have also developed matching components such as high-purity gas valves, self-supporting pressure regulators, gas filters, flame arresters, and vent valves, laying the foundation for the high quality of the entire machine. Since 2009, we have been committed to developing magnetic transmission leak free fans. Based on magnetic transmission leak free gas compressors, we have continued to develop magnetic transmission leak free centrifugal fans and magnetic transmission leak free vortex fans and obtained patents, filling the gap in the field of absolute sealed fans in China. On this basis, we have successively developed high-pressure isolation covers and obtained national patents for nitrogen protection systems in practical applications, laying a solid foundation for the normal use of fans in various harsh environments. The path we have walked has become the past, surpassing the past, striving for excellence, and willing to work hand in hand with all of you.