LONDON (AP) — Online fast-fashion retailer Shein must face the European Union’s strictest level of digital regulations, the bloc said on Friday as it added the company to its list of big platforms that need extra scrutiny.

The EU’s Executive Commission said it formally classed Shein as a “very large online platform” under the 27-nation bloc’s Digital Services Act, an expansive rulebook designed to clean up online platforms and keep internet users safe.

Shein is a low-cost online retailer that was founded in China but is now based in Singapore. It reaches customers mainly through its app. The company said it will “work constructively” to “deliver a safe and compliant environment for our online community.”

“We share the Commission’s ambition to ensure consumers in the EU can shop online with peace of mind, and we are committed to playing our part,” Leonard Lin, Shein’s global head of public affairs, said in a statement. “We also share a commitment to the principles of transparency and accountability that are at the core of the DSA.”