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Selex is a wholly-owned subsidiary of Beijing Sai Microelectronics Co., Ltd. (stock code 300456, hereinafter referred to as "Sai Microelectronics") issued shares in 2015. It is the world's leading MEMS chip manufacturer, focusing on MEMS process development and OEM business for a long time, with superior technical level and process development capability. Selex products have strong realization capabilities and can produce a variety of MEMS sensors such as acceleration sensors, inertial sensors, flow sensors, infrared sensors, optical devices, biological devices, silicon microphones and other MEMS devices, as well as various MEMS basic structure modules. Selex has strong technical strength, has the most advanced through-silicon through-hole insulation process and manufacturing platform in the industry, and has developed more than 60 MEMS core patents, including deep reactive ion etching, which provide key processes for functional wafer-level packaging and 3D integration. At the same time, Selex also has the ability to develop and apply special materials, such as piezoelectric materials, magnetic materials and polymer materials, and has accumulated a lot of experience and know-how and multi-project parallel development capabilities in the continuous practice of providing process development to multiple customers. Selex has a more efficient MEMS custom process development capability, using structured process integration modules to achieve an efficient balance between standardization and flexibility, and can provide MEMS custom process development services while ensuring high product yield to assist customers in mass production of MEMS products. Selex represents the first-class level in the field of MEMS chip manufacturing in the world, and plays a vital role in improving my country's MEMS production capacity and promoting my country's MEMS industrialization process. Saiwei Electronics will rely on Sairex's mature manufacturing technology and production management model to release production capacity, form economies of scale, reduce production costs, and meet the company's huge demand for MEMS products at home and abroad. In addition, Sylex has two wholly-owned subsidiaries. SSA, located in Sweden, provides holding and transfer services for warrants corresponding to options granted to key employees by Selex; SMI, located in the United States, provides marketing and sales services for Selex.

Sellex Microsystems Technology (Beijing) Co., Ltd. (hereinafter referred to as "Sellex Beijing") was registered and established in Beijing Economic and Technological Development Zone in December 2015 with a registered capital of 2 billion yuan. It plans to build an 8-inch MEMS international foundry line construction project covering an area of about 35000 square meters, specializing in semiconductor wafer manufacturing technology development, technology transfer, technical consultation, technical services and product manufacturing, it is a holding subsidiary of Beijing Sai Microelectronics Co., Ltd., and the other shareholder is the National Integrated Circuit Industry Fund. Through the implementation of a series of strategic layouts such as the acquisition of SilexMicrosystem, a leading international MEMS foundry company, Selex Beijing has obtained strong and rich major special achievements and project accumulation, international advanced MEMS foundry technology, management technology and management team and other resources at the beginning of the company's establishment. The process technology team, Silex, the world's largest pure MEMS contract manufacturer from Sweden, has a 0.35um manufacturing process and more than 200 international patents. Manufacturing technology team, technical experts from home and abroad, with many years of experience in factory construction and mass production of well-known semiconductor companies at home and abroad. The implementation of this layout provides a solid foundation for the construction of the first 8-inch MEMS international foundry line in China. The implementation of this foundry line construction project, on the one hand, will provide mature technical support and capacity guarantee for the research and development and mass production of domestic MEMS products, thereby promoting and accelerating the promotion of domestic MEMS sensor products to the Internet of Things, wearable devices, and consumer electronics., Industrial equipment and other fields of industrialization; on the other hand, it will also face the international market at the same time and is committed to becoming an important pole in the global MEMS foundry field.

Beijing Microchip Technology Co., Ltd. (hereinafter referred to as "Microchip Technology") was established on March 24, 2017 with a registered capital of 100 million million yuan. It is a wholly-owned subsidiary of Beijing Sai Microelectronics Co., Ltd., mainly engaged in semiconductor technology development and process The business of development is positioned in the technology development and layout of MEMS business. With the gradual development of the Internet of Things ecosystem, the wide expansion of MEMS terminal equipment, and the continuous evolution of the trend of specialized division of labor in the MEMS industry, the demand for MEMS chip process development and wafer manufacturing from the fields of communications, biomedicine, industry and science, and consumer electronics is growing. After acquiring the SilexMicrosystem of a leading international MEMS foundry company, Saiwei Electronics has obtained strong and rich major special achievements and project accumulation, international advanced MEMS foundry technology and other resources. The establishment of microchip technology will fully integrate and utilize MEMS business resources, improve the MEMS business system, and strengthen the company's leading competitive advantage in the field of MEMS chip manufacturing.

Beijing Sailex International Technology Co., Ltd. is a wholly-owned subsidiary of Beijing Sailex Microelectronics Co., Ltd. issued shares in 2016. It is a first-level wholly-owned subsidiary of Sailex Microelectronics MEMS business segment, mainly engaged in MEMS technology development, Service, consulting and investment management business.

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