Core Viewpoint - The popularity of smart locks in Chinese households is declining due to various issues, leading many to revert to traditional mechanical locks. Group 1: Reasons for Decline in Smart Lock Usage - High failure rates are common with smart locks, as their complex features lead to frequent malfunctions, resulting in additional costs for repairs and maintenance [8][10][15] - Poor battery life is a significant concern, with many users experiencing unexpected lockouts due to dead batteries, which often require emergency locksmith services [10][12] - The initial purchase cost of smart locks is considerably higher than that of mechanical locks, and ongoing maintenance costs can accumulate quickly, making them financially burdensome [14][15] - Users frequently report issues with fingerprint recognition, particularly those with worn fingerprints or elderly individuals, leading to frustration and inconvenience [18][21] Group 2: Security Concerns - Many smart locks do not have high-security lock cores, making them vulnerable to skilled intruders, and there are concerns about the safety of biometric data like fingerprints [21][23] - There have been instances of smart locks malfunctioning, leading to unexpected unlocks, which raises significant safety and security concerns for users [23][24] Group 3: Recommendations for Smart Lock Selection - When considering a smart lock, it is crucial to prioritize security and stability, avoiding lesser-known brands that may lack reliable customer support [27] - Recommended technologies include 3D facial recognition and finger vein recognition for better security and adaptability, especially for households with elderly or young children [29] - Essential features for smart locks should include a C-level lock core, basic unlocking methods, automatic locking upon closing, and a reliable power source with emergency charging options [31][32]