Well it's a white mushroom with gills so that narrows the possibility space to 1 mildly tasty shroom and eight gorillion super deadly poisonous liver failure shrooms
So in Chinese traditions "10000" is just a stand in for "really big number". Kind of like how, at least here in the states, well say "there's a million of them". Not that there is literally 1,000,000 of the thing, but more there is just a lot of them.
Well, this local mushroom is either the Taste Scrumptiouspuff, which is amazing is stews, roasts and stirfry..... or the murderkilldeathshroom. Would you say this fringe is curved with a swirl, or swirled with a curve?
In my part of the world, there are at least a dozen+ culinary and/or medicinal mushrooms that are distinctive and easy to identify (even by casuals like me). These don't really have any dangerous look-a-likes that also grow in the same area. I stick to those and those alone. Granted, even at 12 or so species that I can ID, that's probably like a tiny fraction of the number of different species that exist in this area.