1, brand history and popularity: Chow Tai Fook is a brand with a long history, founded in 1929, and it is the founder of the jewelry industry in China and Chang Gan, enjoying a high reputation, while Jewelry was founded in 1989, with less market experience than Chow Tai Fook.

2. Product line and service: Chow Tai Fook's product line is relatively wide, including gold, diamonds, jadeite and other jewelry to meet the needs of different consumers, while Chang Gan's jewelry product line is relatively narrow, and the service is not as perfect as Chow Tai Fook's.