Shein is reportedly facing pressures from investors to wind down its valuation to around US$30 billion (£23.8 billion) under plans to list on the London Stock Exchange.
According to Bloomberg, shareholders had suggested an adjustment would be needed in order to get the potential initial public offering done.
Previous reports had said the online fast-fashion retailer was set to slash its valuation to roughly US$50 billion through the float.
Were Shein to cut its valuation in line with the calls, this would mark less than half the US$66 billion secured through a funding round in 2023.
Plans had been for the London float to take place in the first half of this year.
However, the Financial Times reported last week that this could be delayed into the latter part of the year after US attempts to end a tax loophole on low-value imports.