When can the lawyer of the victim of a criminal case apply for consulting, extracting and copying the case file?

The victim may entrust a lawyer as an agent from the date of examination and prosecution, and the lawyer may express his written opinions as a defender at the stage of examination and prosecution. According to the above-mentioned legal provisions and the Supreme People's Procuratorate's explanation, if the victim entrusts a lawyer to represent him, he can consult relevant materials from the date of examination and prosecution. In practice, I was commissioned to read several volumes.