Genshin Impact, Raiden Shin joins the chat group

Having transmigrated to the world of Inazuma, Su Hao has access to a chat group.
But aren't the members he added to the chat group a bit strange?
Raiden Shin joined the chat group.
Nagarjuna joined the chat group.
Fushe joined the chat group.
Lei Movie: "Sister... I never expected to communicate with you again in this way."
Zhongli: "Old friend, it's been a long time."
Xiao: "Floating House..."