SINOLINK SECURITIES·2025-10-19 12:38Investment Rating - The report suggests focusing on domestic AI development-driven sectors such as servers and IDC, as well as overseas AI development-driven sectors like servers and optical modules [5] Core Insights - OpenAI is expanding its collaboration and accelerating computing power investments, including a partnership with Broadcom for a 10GW custom AI accelerator, aiming for deployment by the second half of 2026 and completion by the end of 2029 [1] - The demand for optical modules is expected to increase significantly, with projections of 50 million, 75 million, and 100 million units needed in 2025, 2026, and 2027 respectively [1] - TSMC reported a higher-than-expected profit margin of 59.5% for Q3 2025, driven by strong AI demand, and provided a positive revenue guidance for Q4 2025 [1] - Domestic AI applications are entering a large-scale commercialization phase, as indicated by the increase in daily token usage from 120 billion in May 2024 to over 30 trillion by September 2025 [1][3] - The optical communication industry is expected to see growth, as evidenced by Shijia Photon's Q3 2025 revenue of 570 million yuan, a year-on-year increase of 103% [1] Summary by Sections Communication Sector - The telecommunications business revenue for the first eight months reached 1,182.1 billion yuan, a year-on-year increase of 0.8% [4][15] - The optical module exports saw a decline of 28.66% year-on-year in August, attributed to domestic companies building factories overseas [4][34] Server Sector - The server index decreased by 5.85% this week and 8.28% for the month, but OpenAI's initiatives are expected to drive demand for server chips [2][7] - TSMC's high profit margins and capacity expansion are expected to support the production of AI chips [2][7] Optical Module Sector - The optical module index fell by 7.55% this week and 12.35% for the month, but long-term demand is projected to rise due to significant investments in AI data centers [2][7] IDC Sector - The IDC index decreased by 6.24% this week and 8.91% for the month, but the domestic AI ecosystem is forming a rapidly iterating internal cycle [3][10]