Yan Chengxiang: Male, born in 1982, Chinese nationality, no permanent right of residence abroad, bachelor's degree. Mr. Yan Chengxiang has been working in Jiejie Microelectronics Department since November 2005. He has served as chip process supervisor, deputy director of customer service department, director of marketing department, and sales director. As the main technical research and development personnel, Mr. Yan Chengxiang has researched and developed the introduction of ion implanter technology, the introduction of LPCVD technology, acid corrosion and alkali corrosion polishing single crystal silicon technology, polycrystalline silicon deposition technology and ion implantation method to form negative temperature coefficient thin film resistors. and other technical projects, for the company's many patented technologies such as "Gate sensitive triggering unidirectional thyristor chip and its production method", "Gate sensitive triggering unidirectional thyristor chip and its manufacturing method" and "A low junction capacitance over-the-counter chip". One of the inventors of the "Production Method for Pressure-Protected Thyristor Device Chips" and the utility model patent "A high-viscosity photoresist glue-free wire spreading device". Currently, he is the director, deputy general manager and marketing director of the company, and the general manager of Jiejie Microelectronics (Shenzhen).