1, control. Because the old products have been on the shelves for a long time, the data has been judged, and the approximate visitors and sales volume of this product can be roughly predicted, so the rise of old customers is difficult to break out quickly.

2. New products have a weighting period. The weight period mainly focuses on the foundation of two dimensions: new products and new horse racing. We need to do a good job of data feedback in the new race period, so that it is easy to launch the product.