Smart locks went mainstream in Chinese apartments around 2018—typical models offer fingerprint, PIN, NFC card, app, and physical key. Brands like
鹿客 (Lùkè),
凯迪仕 (Kǎidíshì), and
小米 (Xiǎomǐ) dominate. The
智能 ('smart') prefix marks the AI/IoT era of household goods:
智能音箱 (smart speaker),
智能马桶 (smart toilet).