Changjiang Securities·2025-12-09 12:41Investment Rating - The report maintains a "Positive" investment rating for the communication industry [9]. Core Insights - The communication sector saw a 3.65% increase in the 49th week of 2025, ranking 3rd among major industries, and a 70.43% increase since the beginning of the year, ranking 2nd [2][4]. - AWS launched the Trainium 3 chip, significantly enhancing performance and energy efficiency, while DeepSeek V3.2 made breakthroughs in inference capabilities and cost reduction for long sequences [2][5][6]. - The collaboration between AWS and NVIDIA is expected to accelerate the integration of self-developed chips with the NVIDIA ecosystem, clarifying the ASIC penetration logic [7]. Summary by Sections Market Performance - The communication sector's performance in the 49th week of 2025 was a 3.65% increase, with a year-to-date increase of 70.43% [2][4]. - Top gainers in the sector included Tianfu Communication (+25.8%), Tongyu Communication (+23.9%), and Meige Intelligent (+13.7%), while the largest declines were seen in Online and Offline (-11.8%), Data Port (-10.8%), and Kesi Technology (-8.6%) [4]. Technological Developments - AWS's Trainium 3 chip offers a 4.4x performance increase and a 40% improvement in energy efficiency, reducing training costs for clients by up to 50% [5]. - DeepSeek V3.2, the first open-source model to integrate "deep thinking" and "tool invocation," surpassed GPT-5 in inference benchmarks, significantly lowering costs for long sequence tasks [6]. Investment Recommendations - Recommended companies include China Mobile, China Telecom, and China Unicom in the operator category; Zhongji Xuchuang, Xinyi Sheng, and Tianfu Communication in optical modules; and AI applications such as Boshi Jie, Heertai, and Tuobang Co. [7].