A lawyer for Shein summoned to a British parliamentary hearing has evaded questions on whether the fast-fashion giant sells products containing cotton from China.

Fast-fashion online retailer Shein, which is hoping to list in London, faces a UK hearing on Jan. 7 where a British parliamentary committee plans to question the firm, founded in China in 2008, about the rights of workers in its supply chain.

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

Yinan Zhu declined to say whether it retailer's suppliers used Chinese cotton amid concerns over forced labour.

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 or from its Xinjiang province,

A representative of fast fashion clothing brand Shein repeatedly refuses to deny that the company uses cotton sourced from China, where practices are widely speculated to use modern slavery.

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.