Skadden, Arps, Slate, Meagher & Flom and Kirkland & Ellis have the lead roles on Chinese online group discounter Pinduoduo Inc.’s upcoming $1.6 billion initial public offering on Nasdaq.

The Groupon-like company is planning to raise up to $1.63 billion from the U.S. listing next week, according to a prospectus, which would value the three-year-old startup at as much as $21 billion. Founded by ex-Google engineer Colin Huang in 2015, Shanghai-based Pinduoduo allows consumers to group together to buy gross merchandise at lower prices.