engagement ring stamped sterling silver plated 925 w blue crystal (not topaz)

Engagement ring in sterling silver w blue crystal (not topaz) The ring is beautiful and vintage (old of many decades) Has some Chinese lettering that I do not understand, but I guess it is either good luck or love meaning It is stamped 925, but it tested as silver plated It is VINTAGE, and so the plating is not perfect anymore size between 8 and 8.5