Shein has filed a lawsuit against Temu, accusing the rival retailer of systematic copyright infringement, trade secret theft, and counterfeiting. Shein alleges that Temu encourages sellers to steal its designs, uses stolen sales data to replicate top-selling products, and prevents sellers from removing infringing products. The lawsuit also claims Temu masquerades as a legitimate marketplace but controls every aspect of its sellers' activities, including pricing and product listings. This legal battle is the latest in a series of lawsuits between the two companies, with Temu previously accusing Shein of antitrust violations and mafia-style intimidation tactics. Both companies have faced criticism for their labor practices and alleged intellectual property theft, contributing to a fierce rivalry in the fast-fashion industry.