It’s a bit difficult to get a detailed answer here. If you have the conditions, go to the unit for on-site inspection and see who is around the unit, such as doormen, security guards, and shop owners. You may be able to learn something about it. It would be best if you can meet the employees of the unit and chat with them. This information is more objective and true. . Personal experience is for reference, and I have some opinions of my own. After all, if I am not in your environment, it is inevitable that something I think or say is wrong.