I am considering purchasing a smart lock for my elderly parents. After doing some initial research, I have gathered the following points to help me make a decision. Firstly, facial recognition is a convenient feature that can simplify the process of unlocking the door. Secondly, the semi-automatic lock can save power consumption. Thirdly, the ability to monitor the outside situation through the camera is a significant advantage, as it can capture various events. After reviewing the forums and websites of major brands such as Xiaomi, La Ka Ke, and De Shemin, I did not find a smart lock that meets my requirements. Therefore, I am considering purchasing the legendary public model. My budget is around 1500 to 2000 yuan, and I would like to seek advice and opinions from others. Thank you.