商业航天加速发展，AI基建景气持续

Investment Rating - The investment rating for the mechanical equipment industry is "Positive" [2] Core Insights - The commercial aerospace sector is accelerating, and the demand for AI infrastructure remains strong, indicating potential investment opportunities in these areas [11][12] - The performance of excavators and other construction machinery is showing a significant recovery, with notable increases in both domestic and export sales [13][73] Company Summaries 1) Rilian Technology - Rilian Technology is a leading domestic supplier of industrial X-ray intelligent detection equipment and core components, establishing significant technological barriers in core components, AI software, and detection equipment. In the first three quarters of 2025, the company's revenue grew by 44.01% year-on-year, and net profit attributable to shareholders increased by 18.83%. The slower profit growth compared to revenue is attributed to costs related to new production bases and employee stock incentives. The company is expected to convert orders into revenue effectively, leading to profit elasticity release as cost impacts diminish [3][14]. 2) Konstar - Konstar focuses on the research and sales of digital testing instruments. Despite facing performance pressure from tariffs, the company saw a positive turning point in Q3 2025, with revenue reaching 148 million yuan, a year-on-year increase of 22.24%, and net profit attributable to shareholders growing by 30.66%. The company demonstrates strong operational resilience in international markets under tariff pressures, and its domestic business is performing well, with growth potential in MEMS sensors [4][15]. 3) Xinxin Co., Ltd. - Xinxin Co., Ltd. specializes in hard alloys and tools, reporting a revenue growth of 38.02% and a net profit increase of 75.40% in Q3 2025. The company is experiencing accelerated growth in both revenue and profit, driven by effective cost management amid rising raw material prices [5][16]. Industry Trends - The demand for AI-related infrastructure continues to thrive, with significant investments in AI technologies and related supply chains expected to benefit from this trend [12]. - The construction machinery sector is witnessing a comprehensive recovery, with excavator sales reaching 23,095 units in December 2025, a year-on-year increase of 19.2%, and loader sales growing by 30.00% [13][73].