The Chinese internet giant Shein sues rival awe, Temu, accusing the company of stealing his designs and building an empire using forgery, copyright infringement and fraud.

The lawsuit was filed Monday in federal court in Washington.

In her complaint, Shein alleges that the Temuowned by PDD Holdings, is “masquerading” as a legitimate online marketplace because it “encourages its sellers to steal other brands’ designs and then prevents them from removing products from the platform, even after they have admitted to the infringement.”

The lawsuit against Temu comes as Shein herself fends off similar accusations from major brands including Levi Strauss and H&M, as well as independent designers and artists, and prepares to list on the London Stock Exchange.

What’s in the lawsuit?

The two biggest rivals for market share, Shein and Temu have gone to court to accuse each other of a series of scandalous accusations.

Last year, Temu sued Shein over copyright concerns and allegations that it uses “mafia-style intimidation of suppliers” to bully them into exclusivity deals.

Now Shein is hitting back, accusing Temu of “brazen” and illegal behavior.

“Temu is luring US consumers to download and use its mobile app with promises of an ultra-low price. But Temu does not make a profit from the sale of these products, which are priced so low that Temu must subsidize each sale, losing money on each transaction,” the complaint said.

“Only by encouraging its sellers to infringe the intellectual property rights of others and sell counterfeit or substandard products can Temu hope to minimize the enormous losses it subsidizes,” the lawsuit added.

In the complaint, Shein also accuses Temth of design theft and fraud.

At least one of Temu’s employees reportedly stole “valuable trade secrets” that identified Shein’s best-selling products, along with inside pricing information, to aid in its efforts to compete.

“Armed with this stolen information, Temu then directed its sellers to copy these and other best-selling Shein products and sell versions on Temu’s website and mobile app,” the complaint said.