The CTL engraved on the ring indicates that the ring belongs to Chow Tai Fook brand. "CTL" is the abbreviation of CHOW TAI LOOK, which is an English trademark representing Chow Tai Fook. Every Chow Tai Fook product will be printed with the word "CTL", indicating that this product is made by Chow Tai Fook.

Chow Tai Fook Jewelry Group Co., Ltd. was listed on the main board of the Hong Kong Stock Exchange in February, 201/,with the vision of becoming the most trusted jewelry group in the world. The iconic brand "Chow Tai Fook" was founded in 1929 and is famous for its product design, quality and value.