Chinese e-commerce giant Shein has upended the retail industry by figuring out how to make clothes even quicker and cheaper than fast-fashion brands that came before it. Independent brands and global retailers alike are changing how they operate to keep up.

The online upstart is only getting started: it’s planning to raise $1 billion at a $100 billion valuation, according to Bloomberg. If successful, Shein would be worth as much as Zara and H&M combined.

Below, a look at Shein’s path to the top.