after entering the home page of the game, you can see a friend room under the winning list and the wealth list on the left. Just click Enter and confirm. After entering the friend room, you can open the room yourself as the owner or join the room as an invited friend.
after opening a room, you can choose blood flow or bloody battle, and after selecting the mode or extra type, you can click "No room opening". After opening the room, you can invite online friends or invite WeChat friends. Invite online friends, just click invite. Inviting WeChat friends is just sending application messages to friends.