3. It doesn't matter whether you can see the investigation materials. What matters is whether the police station has conducted an investigation according to law and whether compulsory measures have been taken against the suspects.
4. If it is a public prosecution case, the procuratorate will inform you whether to file a criminal incidental civil action before the procuratorate files a public prosecution; If your injury reaches minor injury and public security punishment, and the procuratorate does not take it as a public prosecution case, then you can file a criminal private prosecution and investigate the criminal responsibility and civil responsibility of the perpetrator.
Lawyer Wei Feng of Vertical and Horizontal French Open.