花旗：中国人形机器人-投资者反馈

Investment Rating - The report assigns a positive investment rating to Shuanghuan Drive (002472.SZ) and a cautious outlook on UBTECH (9880.HK) due to its partnerships with leading NEV OEMs in China [1][3]. Core Insights - Humanoid robots are expected to become a significant trend, but investors are cautious due to uncertainties surrounding mass production timelines [1]. - Component suppliers, particularly those with high technology barriers, are viewed as having better long-term investment potential compared to humanoid robot brands [2]. - Strategic partnerships and capital support are deemed critical for the economic viability of humanoid robots in industrial applications over the next 2-3 years [3]. Summary by Sections Industry Trends - The shift towards model-free reinforcement learning and the use of large language models (LLMs) may lead to increased homogeneity among humanoid robots, making hardware stability and durability key differentiators [2]. Economic Viability - Simple industrial applications such as moving and sorting are projected to become economically viable within 2-3 years, driven by improved training and reduced production costs [3]. Joint Selection - The report highlights that harmonic reducers and planetary roller screws are ideal for humanoid robots due to their precision and durability, with companies like Leader Drive (688017.SS) and Hengli Hydraulic (601100.SS) being well-positioned in the supply chain [4]. Recent Developments - The report discusses the supply chain for humanoid robots, identifying key component suppliers and their roles in the production of humanoid robots [11].