Hengjie’s smart toilets are all produced in Foshan. The quality of the factory there is guaranteed, and the patents for smart toilets are also more advanced. I have been using my Q9X for a long time without any problems. Their model has very low water pressure requirements for the house itself. It also has dual seat sensors, automatic flushing and sterilization systems when the seat is removed. Anyway, it has all the things I want from a smart toilet these days. They all work very well. The master installed them very well at the time, and the performance has been maintained well. And even if you have any problems, just contact customer service for after-sales service. The whole machine is guaranteed for 6 years.