Performance evaluation of promotional products: it mainly analyzes the implementation of the number of promotional products, the sales situation and proportion of promotional products, and the comparison with the previous sales. "Comparative analysis of promotional products and previous sales" refers to the comparative analysis of the sales situation of special price products in this schedule and the sales situation of the same days before the special price is implemented. Through the analysis of the above data, we can see the effect of the promotion and the problems existing in the promotion activities.