1. When the patent is granted, you are the legal obligee, and you have the right to prohibit others from producing patented products that are the same as or equivalent to the patent, and you can defend your rights. As for the production of the other party's products in advance, it may be to defend its preemptive right. But even if the defense is successful, it can only be produced on the basis of the original scale and cannot be expanded at will. Therefore, we must defend our rights.
2, the patent is invalid, others can mention it at any time, and your statement has no legal basis.