However, nine times out of ten, the project is false. Fraud gangs casually register a company, which seems formal, but in fact it is a loophole in the law.
Sign a processing contract with you, sell your equipment and raw materials, and do nothing else
Recycling products is bullshit. Anyway, they will never be satisfied with your product, so there is reason not to accept it.
There will be relevant clauses in the contract, which is reasonable and legal. You have to admit that you are unlucky.