On genuine Nike products, the star mark should be standard. Nike's trademark is usually a simple "check mark" pattern, known as a "Swoosh", rather than a star imprint. The "Swoosh" trademark is usually precise and consistent, and appears in the correct location. If there is a problem with the star mark on the Nike product you purchased, there may be the following situations:

1. Counterfeit product: If the product you purchased comes from unofficial channels or unreliable sellers, it may Counterfeit products will be purchased. Counterfeit products often have significant differences in quality and markings.

2. Production batch differences: Sometimes, although it is genuine, there may be some slight changes in the star mark due to differences in different production batches. In this case, the changes are usually not significant and can only be noticed by professionals.

In order to avoid purchasing counterfeit products, it is recommended to choose formal channels to purchase, such as official retail stores or authorized online stores. In addition, you can identify genuine Nike products by comparing multiple products and checking the details of packaging and logos. If you have questions about the products you purchased, you can also contact Nike for consultation and verification.