Am I the Only Living Soul in This Chat Group?

An ordinary person, Gao Tian, accidentally joins a bizarre chat group. The group members' names are all strange, like "Ghost Infant," "Ghost Cave," "Living Person Apartment," "Burning Death Ghost." They often discuss bizarre and thrilling horror stories, and occasionally send out black "red envelopes." The red envelope names are even more peculiar: "Supernatural Item," "Urn," "Spirit Sucking Pot," "Blood Shroud"... Gao Tian never paid much attention. One day, a group member suddenly said: "Among our dozens of ghosts, it seems a living person has snuck in."