1. Check the authenticity of the appraisal certificate of Beijing Zhongce Lianyun: First, check the authenticity of the appraisal certificate to see if there is the identification of the appraisal institution, as well as the name, address, contact information and other information of the appraisal institution. If in doubt, you can contact the appraisal agency for verification.

2. Check the contents of the appraisal certificate of Beijing Zhongce Lianyun: Check the contents of the appraisal certificate, and see if there is information such as the name, model, specification, material, quantity and value of the appraised goods, and whether there is the signature and seal of the appraisal institution. If in doubt, you can contact the appraisal agency for verification.

3. Check the validity period of Beijing Zhongce Lianyun Appraisal Certificate: Check the validity period of the appraisal certificate to see if it is within the validity period. If it has expired, the appraisal certificate is invalid and cannot be used as the basis for appraisal.