The bargain clothing site, which is seeking a London stock listing, declined to shed light on whether its clothing contains cotton from Xinjiang.

A Shein representative declined to provide a direct answer when asked by a British parliamentary committee on Tuesday whether the online fast-fashion retailer uses cotton from China, a key issue for potential investors concerned about its supply chain.

Yinan Zhu, general counsel for the EMEA at Shein, appeared before the Business and Trade Committee on Tuesday amid reports that the fast-fashion retailer plans a stock market float in the UK