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Ruilishi, formally Shenzhen Realis Multimédia Technology Co., Ltd. (深圳市瑞立视多媒体科技有限公司), is a China-based developer of digital human systems positioned at the intersection of motion capture, virtual production, and generative AI, with origins in optical tracking and virtual filming technologies and an expansion into AI-driven avatar generation. Founded in 2015 in Shenzhen, the company initially focused on optical motion capture and MR-based virtual previsualisation systems, which underpin its current digital human pipeline, enabling high-fidelity body and facial animation for virtual characters across film, broadcasting, and simulation environments. Its RTS series platforms, including systems such as RTS-iVatar and RTS-iLive, integrate real-time rendering, motion capture, and streaming capabilities, while its more recent generative AI digital human system adds automated character creation, fine-grained appearance customisation, and AI-driven interaction, including language communication and emotional modelling for more natural engagement . Within the digital human ecosystem, Ruilishi operates primarily as an infrastructure and tooling provider rather than a content studio, supplying end-to-end solutions that allow enterprises and institutions to deploy virtual hosts, training avatars, and simulation agents across sectors such as education, media production, cultural content, and enterprise services, reflecting a broader shift in China’s market toward scalable, system-level digital human platforms that combine real-time animation, generative modelling, and interactive AI.