No. According to Tik Tok's application, jewelry is a luxury and a status symbol. In order to prevent buying fakes, Large Allen will give a jewelry appraisal certificate or expert appraisal signature when selling jewelry. However, some users and experts question its authenticity. It is believed that the authenticity of jewelry can not be judged only by certificates or signatures, but by professional jewelry appraisal institutions. Therefore, when Large Allen sold jewelry, it didn't pass the appraisal of professional jewelry appraisal institutions to determine that it was fake.