If the investigation team needs to conduct on-site investigation, the investigators shall produce the official letter and valid identification documents of China Futures Association. At least two investigators shall be present at the on-site inquiry, and an inquiry record shall be made, and the interviewee and the investigator shall sign the inquiry record page by page for confirmation. If the same interviewee's statement on the same question is inconsistent, it shall be explained and objective evidence shall be provided. Investigators who copy relevant documents and materials shall be signed or sealed by the parties concerned and the units and individuals related to the incident under investigation.