Credible. The inquiry website shows that Xinjiang Zhongyujian Jewelry and Jade Quality Inspection Institute is the designated partner of Nanyang Tik Tok Live Base. Zhongyujian is a professional testing and appraisal institution that has been strictly examined by the national quality and technical supervision department in accordance with the national standards for laboratory qualification accreditation, and has obtained the metrological certification certificate, which can provide certified data and results to the society.