The horizontal line in the jewelry and jade appraisal certificate usually indicates that the test or evaluation result cannot be determined or completed. This means that due to some reasons (such as uncertain test results, technical limitations, sample problems, etc.), accurate conclusions or assessments may not be drawn. ) About the specific appraisal project. In this case, the appraiser will use a horizontal line to indicate that the test result is invalid or uncertain. The horizontal line is used to maintain the accuracy and reliability of the appraisal certificate. If there is a horizontal line, it is recommended to contact an appraisal institution or a professional appraiser for more explanation and detailed information about testing or evaluation.