Pinduoduo's biggest competitor is not JD.com, Taobao, or Amazon, but _______.

Pinduoduo's ultra-low-price strategy makes it very difficult for other platforms to have price advantages, and has dealt a "dimensionality reduction strike" to:

Pinduoduo: Open Pinduoduo to buy cheap quality goods

_______: Scroll through videos, see something you like, and buy it casually