1. medical records: collect all medical records related to injuries, including diagnosis reports, doctors' diagnosis opinions, treatment plans, operation records, etc.
2. Medical expenses and documents: keep all medical expenses and documents related to injuries, including medical expenses, medicine expenses and rehabilitation expenses.
3. Witness testimony: If there are witnesses or others who can provide testimony about the accident process or injury, try to collect their contact information and ask them to write down or record their testimony.
4. Photos and videos: Take photos or videos of the damaged parts and record the appearance and severity of the damage.
4. Contact a lawyer: If you intend to file a claim or legal proceedings, it is recommended to consult a professional lawyer.