Among them, XDY stands for a ring brand, which may be the pinyin initials of Shenzhen old factory "Xindeyuan", Shenzhen Xindeyuan Jewelry Co., Ltd.
Sg25 means that the ring is made of 925 silver, S stands for silver, and 925 stands for 92.5% silver, that is, 925 silver. Composed of 92.5% silver and 7.5% copper, it is skin-friendly, not allergic, bright enough, not easy to turn black and yellow, relatively high in hardness and not easy to deform.
The above information is for reference only. Please carefully identify the material of the ring when buying. It is recommended to choose formal channels to buy.