<h1>Interoperability standards enable cross-protocol smart home ecosystems, prompting global principles on data ownership and ethical AI.</h1> The document describes a China-led industry initiative that establishes a full-link smart home ecosystem through a Universal Gateway bridging Matter, PLC, and Zigbee, enabling cross-brand device synchronization and scenario-level integration; it also launches a Global Joint Initiative embodying ten principles on interoperability, user data ownership, sustainable technology, and AI governance including transparency, controllability, and explainability.