Bystander privacy in smart homes has been widely studied in Western contexts, yet it remains underexplored in non-Western countries such as China. In this study, we analyze 49 Chinese smart home apps using a mixed-methods approach, including privacy policy review, UX/UI evaluation, and assessment of Apple App Store privacy labels. While most apps nominally comply with national regulations, we identify significant gaps between written policies and actual implementation. Our traceability analysis highlights inconsistencies in data controls and a lack of transparency in data-sharing practices. Crucially, bystander privacy -- particularly for visitors and non-user individuals -- is largely absent from both policy documents and interface design. Additionally, discrepancies between privacy labels and actual data practices threaten user trust and undermine informed consent. We provide design recommendations to strengthen bystander protections, improve privacy-oriented UI transparency, and enhance the credibility of privacy labels, supporting the development of inclusive smart home ecosystems in non-Western contexts.

翻译：智能家居中的旁观者隐私在西方情境中已得到广泛研究，但在中国等非西方国家仍缺乏深入探讨。本研究采用混合方法分析了49款中国智能家居应用，包括隐私政策审查、用户体验/界面评估以及苹果应用商店隐私标签评价。尽管大多数应用在名义上符合国家法规，我们发现书面政策与实际执行之间存在显著差距。可追溯性分析揭示了数据控制措施的不一致性以及数据共享实践缺乏透明度。关键问题在于，旁观者隐私——特别是针对访客和非用户个体——在政策文件和界面设计中基本处于缺失状态。此外，隐私标签与实际数据实践之间的差异威胁着用户信任，并削弱了知情同意的有效性。我们提出设计建议以加强旁观者保护机制，提升隐私导向的界面透明度，增强隐私标签的可信度，从而支持非西方情境下包容性智能家居生态系统的发展。