How can I purchase the most cost-effective smart door lock?

For a long time, I believe that many developers who plan to purchase smart door locks or are planning to purchase smart door locks will have several doubts:

What is the current development status of the smart lock industry? Where is the future?

What are the characteristics of smart lock applications in different application fields such as hotels, governments, apartments, residential communities, and office buildings? How to avoid "pits"?

What are the high-end and low-end brands of smart locks? Where are the industrial belts of smart locks distributed?

Is there an authoritative standard in the smart lock industry? What are the key points of smart lock product selection?

How to choose the best smart lock?

How do benchmark developers choose smart lock companies? How to quickly connect smart lock brand companies in batches?