Fast fashion retailer Shein plans to design, manufacture, and distribute a line of Forever 21 apparel and accessories as part of further cooperation with its former competitor that will see the co-branded clothes sold on Shein’s website. The announcement comes two months after Shein and Sparc Group, Forever 21’s operator, signed a partnership agreement that saw the two companies acquire stakes in each other’s businesses. The deepening relationship enables Forever 21 to leverage Shein’s digital interaction and huge customer base while also enhancing the China-tied company’s physical retail presence as it prepares for a potential IPO in the US. [Shein]