Why is there a nameplate in the elevator indicating the limit of the total number of passengers?

Elevator manufacturers all over the world know that you will ask a question in Baidu, so install a nameplate on every elevator that leaves the factory! Not only is there a limit to the total number of members. Also: brand, model, production date, manufacturer's name, address, telephone number, etc. Are you clear? It's a pity that you only asked one question and wasted a lot of feelings.