Technically, Kad doesn't use "servers" in the traditional sense. Instead, it uses a file. This file contains a list of known contacts (nodes) on the network. When you first start up, your client uses these contacts to "bootstrap" itself into the wider network. Where to Find the "Hot" Lists
Locate the field labeled “从以下网址获取节点信息” (or “Bootstrap from URL” in English versions). kad server list hot
The Kad network is a decentralized peer-to-peer (P2P) protocol that powers some of the most resilient file-sharing networks in existence, including eMule and aMule. Unlike traditional P2P systems that rely on a central server to index files and manage users, Kad uses a Distributed Hash Table (DHT) to allow users to find one another directly. Technically, Kad doesn't use "servers" in the traditional