Group 1 - The communication sector underperformed the market in September, with the communication index down 0.15% compared to a 3.20% increase in the CSI 300 index, ranking 14th among 31 primary industries [2][14] - The PE valuation for the communication sector was 23.8 times in September, slightly below the historical median of 33.6 times over the past decade [2][16] - Key performers in the communication sector included optical devices, IDC, and optical fiber cables, with notable stock increases from companies like Tengjing Technology (+66%), Chunzong Technology (+92%), and Yuanjie Technology (+44%) [2][22] Group 2 - The global AI sector remains robust, with North American CSPs planning to invest over $370 billion in capital expenditures for FY2025, a 40% increase year-on-year [3][27] - Oracle reported a significant increase in its remaining performance obligations (RPO), reaching $455 billion, indicating strong future revenue potential [3][30] - The global Ethernet switch market is projected to reach $14.5 billion in Q2 2025, reflecting a 42.1% year-on-year growth, driven by data center demand [3][33] Group 3 - Domestic CSPs in China are expected to invest over 450 billion yuan in AI computing power by 2025, with companies like Alibaba and Tencent leading the charge [4][50] - The industrialization of domestic super-node data centers is accelerating, with Alibaba launching its new generation of AI servers and Huawei showcasing significant advancements in computing clusters [4][52][58] - The demand for optical modules remains high, with ongoing advancements in CPO and OCS technologies, as major chip manufacturers increase their orders to meet AI server requirements [4][70] Group 4 - Investment recommendations emphasize the importance of AI computing infrastructure, suggesting continued focus on optical devices, communication equipment, and liquid cooling technologies [5][21] - The three major telecom operators are highlighted as important assets for long-term investment due to their stable operations and increasing dividend payouts [5][21] - A recommended investment portfolio includes China Mobile, Zhongji Xuchuang, ZTE, and Guanghetong for September 2025 [5][21]

Investment Rating - The report suggests a positive outlook for the AI chip sector, particularly in the context of domestic developments and overseas demand for servers and optical modules [4]. Core Insights - Domestic AI development is driving growth in sectors such as servers and IDC, while overseas AI advancements are boosting demand for servers and optical modules [4]. - The launch of DeepSeek-V3.1 is expected to facilitate the large-scale deployment of domestic AI chips, enhancing the competitive landscape [1][2]. - The liquid cooling market is anticipated to expand significantly, with companies like Invec benefiting from strong demand in AI data centers [1][12]. Summary by Sections Communication Sector - Telecom business revenue reached 905.5 billion yuan in the first half of the year, showing a year-on-year growth of 1% [3][14]. - The number of fixed broadband users reached 684 million, with gigabit users accounting for 33% [20]. Server Sector - The server index increased by 8.30% this week and 17.28% this month, with Industrial Fulian reporting improved efficiency and yield for its GB200 and GB300 models [2][6]. - GB300 is expected to become a significant profit driver for the company's AI server business next year [6]. Optical Module Sector - The optical module index rose by 4.34% this week and 14.59% this month, driven by Google's adoption of OCS technology [2][9]. - Coherent and Lumentum reported their first revenue from OCS orders, indicating market expansion [9]. IDC Sector - The IDC index increased by 6.78% this week and 14.41% this month, with DeepSeek-V3.1's release expected to alleviate the shortage of domestic AI inference cards [2][12]. Liquid Cooling Sector - Invec reported a revenue of 2.573 billion yuan in the first half of 2025, a year-on-year increase of 50.3%, driven by strong demand for liquid cooling solutions [12][52]. - The establishment of the UQD alliance aims to enhance the reliability and interchangeability of liquid cooling connectors, reducing operational complexity [12].

Investment Rating - Maintain "Buy" rating for the industry [4] Core Viewpoints - The market has underestimated the explosive potential of innovative connection solutions in optical communication, particularly with the increasing demand for MPO and shuffle box in complex interconnections [1][21] - The transition from 400G to higher speeds like 800G and 1.6T in optical modules is becoming a consensus, creating new opportunities for passive connection devices [3][24] - The report emphasizes the importance of high-density, high-speed, and low-power solutions in the context of growing computing clusters, which will drive innovation in passive products [24] Summary by Sections Investment Strategy - Focus on the undervalued high-speed optical interconnect sector, recommending "Two Big and Four Small" companies: Tianfu Communication, Sanhuan Group, and smaller firms like Taicheng Light, Shijia Photon, Bochuang Technology, and Zhishang Technology [7][13][24] Market Review - The communication sector has seen an increase, with the blockchain segment performing the best [18][19] - The report notes significant stock movements, with Guomai Technology leading the sector with a 46.586% increase [20] Weekly Topic - The upcoming GTC and OFC events are expected to highlight new technologies in optical communication, with a focus on the demand for more compact and efficient solutions [1][21] Key Recommendations - The report suggests monitoring developments in optical modules and passive connection devices, as these areas are poised for growth due to technological advancements and market demand [24][26]