2, it should not (specific issues should be analyzed in detail)
3, no
It would be nice to have that contract, because all the evidence favorable to your father is on it, and now the contract has been taken away by the factory, which is very unfavorable to your father. If there is evidence that your father was out when those ladies came, that will be fine.
-Amateur lawyer (himself)
You can ask in your hometown law firm or go to the public security organ.