Founded in 2015 by serial entrepreneur, Colin Huang, Pinduoduo Inc. (PDD) had become China's fastest-growing e-commerce platform in history. PDD pioneered a new approach to online shopping that allowed shoppers to share products, invite friends to form shopping teams, and purchase together at discounted prices. The company's rapid development helped it debut on the Nasdaq in July 2018, only three years after its inception. The fast growth was partly boosted by PDD's heavy investment in marketing and branding, such as through coupons and promotions. How should the company make its competitive advantages more sustainable? Could its business model be replicated outside China?