RD is the manufacturer. The name of this manufacturer is "Ruifuda Jewelry". This company is an old jewelry manufacturer, and its quality and reputation are guaranteed.

Pt900 is a ring material made of platinum with 90% gold content, also known as platinum; This purity is still relatively high in platinum jewelry;

17 means ring number, and your ring number is 17.

On the whole, your ring is quite good. Ruifuda is an old brand. The quality is definitely no problem. Don't worry!