Shein has filed a lawsuit against rival Temu in a Washington, D.C. federal court, according to this report, accusing it of stealing designs and building its business through counterfeiting, intellectual property infringement, and fraud. The lawsuit claims that Temu encourages sellers to infringe on other brands' designs and prevents them from removing infringing products. Shein also alleges that Temu uses Shein's confidential information and deceptively markets counterfeit products as higher quality than genuine Shein goods. The legal battle between the two fast-fashion giants underscores their fierce competition and mounting allegations of unethical practices.