This document, an excerpt from a Chinese IT newsletter, discusses the phenomenon of "wool party" in China, which refers to individuals or groups who exploit online service promotions and reward programs for financial gain. The text differentiates between casual participants and professional wool parties, who use illegal methods like creating numerous fake accounts and exploiting system vulnerabilities to acquire and cash out large amounts of points or coupons. This organized effort has become an industrialized operation with specialized roles and a supply chain for obtaining fraudulent resources. The article highlights the significant financial losses incurred by companies and the difficulty service providers face in effectively combating these activities without alienating legitimate users, exploring various attempted countermeasures and their limitations.