LJ, Longjia refers to the manufacturer, and the difference is only an abbreviation and a Chinese character. ...

PT950 is the composition content of the ring. PT refers to platinum, followed by the value of platinum fineness (purity).

PT950 means that this ring is made of 950‰ platinum, that is, the platinum content is 95% and the other 5% is other metals (determined by manufacturing process and technology).