Are shoppers to blame? As the huge fashion company seeks to raise money on the London Stock Exchange, conditions in Chinese factories are under the spotlight.
Shein workers exploited for £6 shirts
Unethical: Shein, founded in China and now headquartered in Singapore, has been criticised for exploiting low-paid workers in China to sell its clothes at knockdown prices. Workers do 75-hour weeks, earning less than 1p per garment. Glossary
Guangzhou - The fifth most populous city in China.
Stock exchange - A place where investors can buy and sell stocks, which represent tiny portions of ownership in a company.
Sweatshops - A shop or factory in which employees work for long hours at low wages and under unhealthy conditions.
BBC - The British Broadcasting Corporation is the UK's national broadcaster.
Uyghurs - A largely Muslim ethnic group native to Xinjiang, in northwestern China. Since 2014, the Chinese government has subjected them to abusive measures, including forced labour, internment camps and forced sterilisation.
Cost of living - The money that someone needs to afford basic food, housing and clothes.