Well certainly you can chew some species directly dried without additional cooking but they will probably be very gummy & hard to chew. I have never tried to do so except of chewing the dry magic mushrooms whose taste I really like.

Considering the mushrooms coming from China, I must inform you that recently I've read an article about the toxic research of those mushrooms in which was discovered the high level of poiseness substances.

My advice woyld ve that you try to dind dried mushrooms which were picked in the forest where they were growing wildly cause the very similar rumours came to me - of highly intoxicating substances been found in artificially grown mushrooms coming from anywhere but especially from China!