It's different. Geodetic appraisal certificate is different from Zhongshi appraisal certificate. Geodetic certificate is GIC certificate of China Geo University (Wuhan) Jewelry Testing Center. Stone Jewelry Appraisal Center (NTGC for short) is a company that has been appraised as qualified by the National Accreditation Committee and always focuses on the detection of jewelry, jade and precious metal ornaments.