My wok pan looks worn off, I can see the silver underneath, why?
Your non-stick coating appears to be coming off the underlying metal.
The solution is to discard the wok (it cannot be saved) and replace it with a plain, uncoated carbon steel wok.
Stainless steel is a lousy conductor of heat - DO NOT (buy one).
Avoid non-stick coated woks, they cannot stand the high heat/high temperatures required for proper cooking in a wok.
Season the carbon steel like you would a cast iron skillet and avoid the dishwasher.