Changjiang Securities·2025-12-02 09:42Investment Rating - The report maintains a "Positive" investment rating for the communication industry [9]. Core Insights - The communication sector saw an increase of 8.71% in the 48th week of 2025, ranking first among major industries in the Yangtze River region. Year-to-date, the sector has risen by 64.42%, also ranking first [2][4]. - Google's introduction of the Nested Learning theory and HOPE architecture significantly enhances long-term memory and reasoning efficiency, addressing the memory bottlenecks of traditional Transformers in long sequences, which can greatly reduce training and inference costs [5][7]. - Anthropic's Claude Opus 4.5 has achieved state-of-the-art performance in software engineering, with aggressive pricing strategies that lower input and output costs by 67%, while also integrating deeply with existing office workflows [6][7]. Summary by Sections Market Performance - The communication sector's performance in the 48th week of 2025 was highlighted, with notable individual stock performances, including Guangku Technology (+39.2%), Tongyu Communication (+39.1%), and Taicheng Light (+22.3%) [4]. Technological Advancements - Google's Nested Learning paradigm optimizes memory processes by breaking down large models into nested sub-optimization problems, enhancing memory management and reducing inference costs [5]. - The HOPE architecture, based on this theory, separates high-frequency and low-frequency memory tasks, improving efficiency in long-sequence processing [5]. Product Launches - Anthropic's Claude Opus 4.5 supports a context window of approximately 200k and has outperformed competitors in software engineering tasks, with a significant reduction in usage costs for enterprises [6]. Investment Recommendations - The report recommends several companies across various segments, including: - Telecom Operators: China Mobile, China Telecom, China Unicom - Optical Modules: Zhongji Xuchuang, Xinyi Sheng, Tianfu Communication - AI Applications: Boshi Jie, Heertai, Tuobang Co., Yiyuan Communication - Satellite Applications: Huace Navigation, Haige Communication, Canqin Technology [7].