1. Low raw material cost: China Gold has lower raw material purchasing cost, so the cost is lower.

2. More mature technology: China gold has more mature technology and higher production efficiency, so the production cost is lower.

3. Higher quality: The quality standard of China gold is the same as that of Chow Tai Fook, but the quality of some products may be higher, so the price can be lower.

4. Brand influence is different: Chow Tai Fook, as a well-known brand, has a high brand premium, while China gold brand has a relatively small influence, so the price is relatively low.

It should be noted that the price difference between different brands may also be affected by other factors, such as different market positioning and sales strategies. In addition, due to geographical and technical factors, the price difference may also be different.