most of the major appraisals are submitted before 12: a.m. and certificates can be obtained after 4: p.m .. The GIC certificate of China Geo University (Wuhan) Jewelry Testing Center is reliable. GIC, also known as Jewelry College of China Geo University (Wuhan), is a well-known academic institution. Its jewelry appraisal is the most authoritative appraisal institution in China, and its appraisal conclusion is also very authoritative in the industry.