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Investment Rating - The report maintains a "Buy" rating for Kstar and Envicool, while Kehua is rated as "Neutral" [2][11]. Core Insights - The data center supply chain in China is experiencing strong demand, with expectations for continued capacity expansion through 2025 and potentially into 2026, despite challenges such as overseas chip supply constraints [1][5]. - The report has revised earnings per share (EPS) estimates downward by 17%-31% for Kstar, Envicool, and Kehua, primarily due to uncertainties in domestic solar inverter and energy storage system (ESS) demand, as well as intense pricing competition [1][7]. - Kstar is favored over Kehua due to its faster long-term growth potential, better margin profile, and more attractive valuation metrics [2][5]. Kstar Summary - Kstar's sales and net income for 4Q24 decreased by 9% and 76% year-over-year, respectively, while 1Q25 showed a 14% increase in sales but a 17% decrease in net income [5][8]. - The company anticipates 30%-50% year-over-year order growth from domestic internet and telecom customers in 2025, with significant opportunities for customer base expansion [6][9]. - Kstar's total revenue is projected to grow from Rmb 4.159 billion in 2024 to Rmb 9.642 billion by 2030, with a net income increase from Rmb 394 million to Rmb 1.455 billion over the same period [10]. Envicool Summary - Envicool's 4Q24 and 1Q25 results missed expectations due to delayed revenue recognition and increased operating expenses, leading to a 31% downward revision in EPS estimates [11][15]. - The data center room cooling segment saw sales growth of 49% in 2024, with a record high order backlog by 1Q25, indicating strong demand [13][14]. - Envicool's total revenue is expected to rise from Rmb 3.529 billion in 2024 to Rmb 4.589 billion in 2025, with net profit projected to increase from Rmb 344 million to Rmb 453 million [16].

- ■■- 核心摘要 2022年12月ChatGPT发布，引发全球市场对于AI发展的关注。伴随美国头部云厂商不断提升资本开 支，AI基建领域产生众多投资机会。涉及产品包括变压器、UPS（不间断电源）、服务器电源、液 冷；甚至由于AIDC（AI数据中心）建设的火爆，导致电网接入点稀缺，核电成为AIDC的优质电 源，包括核电公司以及可控核聚变公司均受到关注。 我们复盘ChatGPT发布后，海外AIDC基建类产业链股价走势，可以发现各区间段收益率靠前的细分 赛道，基本对应当时AI产业演进中的核心矛盾或进展。从规律来看，大致可以分为四个阶段：1） ChatGPT出现带来算力需求高增，期间服务器电源关注度攀升；2）算力高增推动芯片技术迭代，相 应导致功耗提升，服务器电源、液冷需求提升；3）AIDC进入实际建设阶段，AI基建（备用电源、 变压器需求增加）；4）AIDC建设导致电网接入点难寻，燃气轮机、核电相应概念热度提升。 综合以上分析，对于中国AIDC各细分产业链，我们观点如下： 传统备用电源有望享受量价齐升红利。 海外头部企业整体指引2025年营业利润率有望提升。我们认 为主要原因有（1）需求量端，AI数据中心建设浪 ...