It’s true. According to Tianyancha’s query, Tianjin Guojian Jewelry Testing Center has registered a trademark and obtained certification from the industrial and commercial department. Tianjin Guojian Jewelry Testing Center is one of the authoritative institutions in the field of jewelry and jade appraisal in China, so the certificate issued is authentic. The center was established in 1987 and is located at No. 93 Nanjing Road, Heping District, Tianjin. It is a comprehensive institution integrating jewelry appraisal, testing, evaluation, consultation, technical research and talent training.