The third gem is yeast, which is of good quality. Laosan Jewelry Co., Ltd. is a jewelry company, and its yeast quality depends on its procurement and production processes and standards. When purchasing raw materials, Laosan Jewelry will choose high-quality precious stones and metal materials, and in the production process, it will carry out multi-process inspection and quality control to ensure product quality. In addition, Laosan Jewelry will also provide corresponding quality assurance services to protect the rights and interests of consumers. Generally speaking, the yeast quality of Laosan Jewelry is still guaranteed.