The chat tool of 1688 is called "Wangwang", which is an instant messaging tool developed by Alibaba and designed for communication between buyers and sellers on the 1688 platform.

Wangwang can communicate online in real time, including text, pictures, voice and other forms of message transmission, which is convenient for buyers to ask for product information and negotiate prices and transaction details with sellers. At the same time, sellers can also recommend products to buyers through Wangwang, which facilitates faster transactions and better customer service.

Wangwang also has functions such as automatic translation and online payment, which further optimizes the transaction experience of the 1688 platform.