Setting of validity period: the validity period is the validity period of the report, which is equivalent to the validity period of the evaluation result. The validity period is essentially the reporting responsibility period. The evaluation report provided is a formally delivered product, which is meaningful to the entrusting party only after it is officially handed over to the entrusting party, so it is generally believed that the effective date of the report should be the submission date. On the benchmark date of evaluation, even the evaluation report and conclusion were not issued, so it has no effect at all.