1. The crime of intentional injury can be prosecuted by private prosecution or public prosecution. Because it is a type with minor circumstances and little harm, private prosecution cases can be allowed to settle. In layman's terms, it can be settled by both parties through consultation.
Of course, you should mobilize the other party not to pursue your father's criminal responsibility, even if it is a private prosecution that leads to minor injuries, you may be sentenced, so I suggest you make a settlement with the other party, pay more for medical expenses and say something nice to avoid going to jail.
3. It's certainly a good thing that the other party doesn't do the appraisal, because one of the bases of criminal responsibility is the forensic appraisal of the injury. If it is a minor injury, there is generally no criminal responsibility. If it is a minor injury, criminal responsibility can be investigated. If it is a serious injury, criminal responsibility must be investigated. If you don't know what the injury is without identification, you can't be punished as a crime. This is good for you.
4. Your father will not be investigated for criminal responsibility if minor injuries cannot be reached through appraisal, or even if minor injuries are settled by both parties. In this case, if you get bail in advance, you will get bail even if you don't get bail after one year. Generally, the public security organs will terminate after reconciliation.
It is suggested to continue to negotiate with each other, and reconciliation is the most correct way to solve the problem.
Supplement: if there is no crime, it will be terminated within one year. If you delay for one year, you will be dismissed without committing a crime. You can chat online, I don't go to QQ.