Protease and bacteria attached to the skin slowly penetrate into the interior of bean curd, and gradually decompose protein into various amino acids and free fatty acids. It can turn into stinky tofu after 3 months to half a year, and the biological enzymes used in various sufu are different.
Stinky tofu is fake, but it's nonsense to make it out of shit. It is estimated that the technology of making stinky tofu with excrement is higher than that of making stinky tofu.
The so-called fake goods are unqualified in quality and hygiene. Raw tofu is ordered with unqualified food additives. Accessories such as salt may also be unqualified industrial raw materials. But it won't kill you.
Everything is like this now. Nothing is false. If you are afraid, you can not eat.
If you are afraid, go to the supermarket to buy regular brand food. There is nothing to be afraid of. Don't be afraid.