1. The raw material cost of Liu Fu gold is high, and it is made of exquisite technology and high-quality raw materials, which makes its products have high value.

2. Liufujin brand premium is higher. As a well-known high-end jewelry brand, Lukfook Gold enjoys a high reputation and popularity in the market, so it can get a higher price.

3. Liu Fujin's design is more exquisite and complicated, and the unique hand-made technology enables him to get a higher price in the market.

4. Luk Fook Gold has more kinds of products, covering a wider range of consumer demand, making it more influential in the market, thus obtaining higher prices.

To sum up, Liu Fu Gold is more expensive than Lao Fengxiang mainly because of higher raw material cost, higher brand premium, more exquisite and complex design and more product types.