Not all the Wanlaizhu jewelry sold in Tik Tok is true, because the merchants selling jewelry will attach a jewelry appraisal certificate, which records the origin, material and expert's appraisal signature of the jewelry, as well as the watermark of the merchant. This is true if the jewelry sold in Tik Tok meets the above requirements. Only with the jewelry appraisal certificate can it be proved that the jewelry sold in Tik Tok is true, and vice versa.