Recently, in the measurement audit for chemical composition analysis of industrial silicon organized by China NIL Research Center for Proficiency Testing, both Yunnan Tongwei and Inner Mongolia Tongwei achieved "Satisfactory" ratings across all test items, successfully obtaining the measurement audit certification. This achievement signifies Tongwei's attainment of internationally leading standards in the field of industrial silicon testing.

Certificate

As the first domestic proficiency testing institution recognized by Nadcap and an authoritative institution accredited by the China National Accreditation Service for Conformity Assessment (CNAS), the China NIL Research Center for Proficiency Testing have high credibility and influence within the industry. This audit testing covered core indicators such as iron, aluminum, and calcium in industrial silicon. Through blind sample comparison and process traceability, the testing accuracy and standardization of the laboratories were comprehensively assessed. From sample reception and test process execution to result analysis, Yunnan Tongwei and Inner Mongolia Tongwei strictly adhered to the international general quality management system. With advanced testing equipment, a professional technical team, and standardized operating procedures, they demonstrated precise and stable testing performance, ultimately achieving an "satisfactory" rating, fully validating the reliability and credibility of the company's testing data.

Obtaining the measurement audit certificate further enhances the trust of customers and the market in Tongwei. Guided by the "Dual Carbon" goals, Tongwei will continue to refine its quality management system, strengthen technical team training, and actively participate in more international proficiency testing activities, using precise testing as its foundation and technological innovation as its driving force. The company remains committed to delivering higher-quality products and services to customers and markets, contributing to the high-quality development of the industry.