Core Viewpoint - The company held a Q3 2025 performance briefing on December 5, 2025, to communicate with investors and address their concerns regarding the company's operations and performance [1][2]. Group 1: Performance Briefing Details - The performance briefing was conducted via the Shanghai Stock Exchange's online platform, lasting from 10:00 to 11:00 on December 5, 2025 [1]. - Key executives, including the chairman, general manager, independent director, and financial director, participated in the briefing to engage with investors [2]. Group 2: Investor Questions and Company Responses - The company's CVD diamond product yield rates are at an advanced industry level, with over 80% for cultivated diamonds and 90% for functional diamond materials [3]. - The core technology for CVD diamond production is the MPCVD (Microwave Plasma Chemical Vapor Deposition) method, which deposits carbon from gas onto substrates to form diamonds [3]. - The performance metrics for CVD diamond functional materials include thermal conductivity of 2200 W/mK for single crystal heat sinks and 1200 W/mK for polycrystalline heat sinks, with optical transmittance rates exceeding 70% for single crystals and 65% for polycrystals [3]. - The actual controller, Du Shunxian, reduced her holdings through block trading to optimize the company's equity structure and enhance market liquidity, with no significant impact on governance or operations [3].

Core Viewpoint - The company, Sifangda, has significant advantages in the production of large-sized diamond heat sinks, particularly with its proprietary MPCVD equipment technology and CVD diamond growth process [2] Group 1: Company Technology and Capabilities - The company possesses independent intellectual property rights for MPCVD equipment technology and CVD diamond growth process technology [2] - The company has the capability to mass-produce large-sized (12-inch) diamond substrates and films [2] Group 2: Market Position - The company is recognized as a leading CVD diamond manufacturer in terms of equipment scale in China [2]