Jinliufu is not a Hong Kong brand, but a local domestic brand in Shenzhen. Chow Tai Fook, Luk Fook Jewellery, Zhou Shengsheng and Golden Supreme are truly the four major brands in Hong Kong. As you said, pd990 ring is real, it is palladium, not platinum. Platinum begins with pt. Like many private gold shops in China, palladium at the beginning of pd is often used to fool people, and you can't return it if you want.