7.5 fold. According to the query of Chaohongji Ruby official website, Chaohongji's gold ring, inlaid /k gold jewelry and ruby are 7.5% off. Chaohongji trademark is a self-owned jewelry brand of Guangdong Chaohongji Industrial Co., Ltd., which is a famous trademark in Guangdong Province. Is a design, processing and production, wholesale, retail platinum inlaid jewelry-based large enterprises. Founded in 1996, the company founded the brand "Chaohongji" in July 1997.