1. High-quality gold mine supply: Longtai Jewelry ensures the use of high-quality gold mines by strictly screening and purchasing high-quality gold mine suppliers. These gold mines have undergone a professional refining process to remove impurities and dopants and ensure a high level of gold purity.

2. Advanced production technology: Longtai Jewelry has advanced production technology and equipment, and improves the purity of gold through precise metal melting, purification and refining processes.