Hello, the "five stars" marked in the upper right corner of Dangdang's book picture refers to the books whose products are rated as five stars by most customers. For details, please refer to Dangdang's five-star book list /book/5stars, as shown below.

The "best seller" marked in the upper right corner of the book picture refers to Dangdang's best seller, which mainly comes from the actual purchase data of millions of customers. See Dangdang bestseller list/book/bestseller/? Type=recent7, as shown in the following figure:

Please understand. I hope my reply can help you. Have a nice shopping. Thank you.