1. Fine craftsmanship: As a century-old national brand, Lao Fengxiang's meticulous craftsmanship and attention to quality and details make its processing cost relatively high, so the processing fee per gram 120 yuan is relatively high.

2. Brand influence: As a well-known jewelry brand in China, Lao Fengxiang has a high brand influence and popularity, and the value of the brand is also reflected in the price of the product, so the processing cost of Lao Fengxiang is relatively high.