Shein, the e-commerce retailer founded in China, is partnering with the parent of Forever 21 to expand its reach into Americans’ closets. The tie-up will bring together two of the biggest names in the fast-fashion sector online and in malls across the country.As part of the agreement, Shein could one day operate stores-within-stores at Forever 21 outlets, while Forever 21’s clothes would be sold on Shein’s site. The deal also includes investments from each partner in shares of the other.In the early 2000s, Forever 21 helped popularize the concept of fast fashion to American shoppers, standing out in malls with a revolving carousel of $5 tops and $10 dresses that hit racks more quickly than traditional department store schedules.Shein, founded in 2012 and now headquartered in Singapore, has gained popularity among American shoppers in recent years by taking fast fa …
