The service fee is used for future maintenance, testing, installation and machine transfer. As long as it is a water machine, it must be maintained. If you go to the market to buy it yourself, it will definitely cost 5000 yuan. Will you buy it without hesitation? Even if you buy it, you still have to pay for the service. How much do I think the family can bear? It's only a symbolic service charge, and it's also very cost-effective! As long as there is something wrong with our TV refrigerator, whether it is repaired or not, we have to pay for opening the back cover! Why can you accept this idea? Why can't you accept the idea of paying a little for bringing healthy drinking water to the whole family? How can the whole world want to take advantage and drink safe and healthy water? Public welfare projects have brought benefits to the public, so why take them? There is still a lot of discussion. . . . . . .