Patent application is only in the acceptance stage, can it play a protective role?

Yes, the patent law stipulates that as long as the national intellectual property rights have been accepted, they will be protected by law from the date of acceptance. The date of patent protection is also counted from the date of application. But in your case, it is risky for you to take measures, because if the patent is not authorized in the end, then you need to bear the responsibility of seizing the goods or taking measures. So I suggest you, what you have to do now is not to reduce the price, but to practice your internal strength. Collect evidence (the equipment invested by the other party, the number of orders sold), and when the patent right is granted, they can be held accountable one by one. In this process, it is best to ask a lawyer or someone with legal knowledge for help.