Investigation process: In January 2018, our investigator discovered during routine market visits that packaging bags for large-scale production of wind turbine license plate super powder were being sold throughout the country. After long-term investigation and tracking, the hideout and warehouse of the fraudulent gang have been identified. And assisted the Food, Drug and Environmental Crime Investigation Brigade of Guangzhou Public Security Bureau in carrying out criminal crackdowns on the gang that month. Findings: 15180 finished products of Windmill trademark super powder paper bags were seized on site (each product contains 4 registered trademark WINDMILL and Windmill logo, totaling 60720 registered trademark logos), 135600 semi-finished bag surfaces were seized (each product contains registered trademark WINDMILL and Windmill logo