It's true. The authenticity of the certificate depends on the authority of the inspection agency and the reliability of the certificate itself, not whether the certificate contains a website. The national inspection certificate for pearls is issued by the National Jewelry and Jade Quality Supervision and Inspection Center (NGTC) and other authoritative inspection institutions. These institutions have professional appraisal ability and strict quality control system, and their certificates are highly reliable. Therefore, the national inspection certificate of Pearl really has no website.