Mengjinyuan Wanchunjin 9999 series products are produced according to the standard of Jinjin9999 jewelry enterprise. The main advantages are that the gold content reaches 999.9%, the national inspection issues the label of Au9999, and it is produced by solder-free welding technology, without adding solder, which is environment-friendly, value-preserving and non-discoloring. Each piece of jewelry has a single identification code, and the raw materials come from Shanghai Gold Exchange, which is not pure enough, and it has many advantages such as changing an award and a new style every year.