Genshin Impact, Raiden Zhen joins the chat group

After traveling to Inazuma, Su Hao has a chat group.
But the members who joined his chat group are a little strange, aren't they?
Raiden Zhen joined the chat group.
Ruo Tuo Long Wang joined the chat group.
Fu She joined the chat group.
Lei Yingying: "Sister... I didn't expect to communicate with you again in this way."
Zhongli: "Old friend, long time no see."
Xiao: "Fu She..."