Here is a guide on how to play cross-platform online play in Diablo 4. Players can learn about cross-platform online play through this article. If you want to play online with your friends, you might as well take a look.
1. You can invite friends to form a team online through cooperation mode
2. Up to 4 players can form a small team to clear the map and win the book.
3. However, it should be noted that the game's servers are not in China, and Battle.net's server network is severely restricted. If you are directly connected to the Internet, you may encounter situations where you are unable to successfully join a team or are disconnected.