It is difficult to give a number of years, because the service life will differ depending on the conditions of usage and frequency of use.
To extend its lifespan, here are some tips that you can follow:
Use medium to low heat when cookingDo not heat an empty wok for too longDo not store cooked food in the wok for a long time (one day or longer).slightly oil the frying pan/saucepan before first use and then wash and dry it, repeat the process from time to time if you wash the frying pan/saucepan regularly in the dishwasher.