What platforms are there for purchasing channels?

What platforms are there for purchasing channels? Explain as follows.

1688 wholesale platform Alibaba-the world's leading purchasing and wholesale platform, Alibaba is now the first choice for many sellers who have no supply advantage, and is also a big domestic product. . . Hangzhou Women's Wear Network was originally embedded in H5 Mall in the form of service number. Later, the APP was developed and renamed as cargo catcher, and the WeChat applet was launched. Headquartered in Hangzhou, the earliest products mainly came from Hangzhou. . . Baidu Aigou platform Baidu Aigou is a B2B vertical search engine, which aims to help users directly access the product information of the whole network and reach a large number of high-quality businesses. Provide search goods for buyers.