How often should Blancpain watches be maintained?

Hello, under normal circumstances, mechanical watches should be maintained for about 3-5 years. With the use of watches, the friction between parts will increase, and the watchband will be corroded or scratched due to careless use, and damaged by other factors. It is necessary to clean and polish the strap to make the watch look brand-new, so it is necessary to maintain it regularly. I suggest you send it to a professional maintenance organization for regular maintenance.