1. Open the personal hotspot of wifi in your mobile phone.
2. Open the Rust Battle and click the multiplayer game.
3. When the point setting is turned to the bottom, the default port number will be 35 10.
4. Click Create Room.
5. Then click "Create Public Room".
6. At this time, the local area network has been formed, and anyone can open a room, but the ip remains unchanged.
7. Let the online people click the multiplayer game, enter the displayed ip address 35 10, and click "Join".
8. Finally click to start the game.