1. Promotional activities: Tmall usually has many promotional activities, such as full reduction, coupons, limited-time discounts and so on. , may lead to the actual price of goods more favorable than official website.

2. Channel cost: official website's channel cost is relatively low, while Tmall's channel cost will be higher, which may lead to price differences.

3. Store operating costs: Tmall's store operating costs include store decoration, advertising and personnel salaries. These costs will affect the price of goods.

4. Different versions: The official flagship store in Lan Zhi has a higher version of the cream, so it needs a higher price.

5. Different types: Lan Zhi official flagship store can choose more types of creams, so the price will be higher.

In a word, these factors may lead to the price difference between Lan Zhi's isolated official website and Tmall. Please note, however, that price fluctuations and specific conditions may change with time and various factors.