Reliable. According to Aiqi's inquiry, as of June 22, 2023, 165438+ Jiangsu Gold and Jewelry Testing Center is an authoritative organization authorized by Jiangsu Quality Supervision, Inspection and Quarantine Bureau, with a high-quality professional technical team and advanced testing instruments and equipment, which can conduct all-round testing and analysis on gold, jewelry and other items, including weight, purity, hardness, refractive index and color. The test results are accurate and reliable, which can provide authoritative guarantee for consumers.