Wu Lili experienced a psychological illusion of someone standing behind her, likely triggered by the recent murder of a female resident in her building. This fear was exacerbated by her nightmares, where she saw a hooded figure with a knife approaching her from behind.
Wu Lili followed a suggestion from online friends to place a mirror next to her computer desk. The mirror was angled to reflect the area behind her, allowing her to check for any presence without turning around.
In the mirror, Wu Lili saw a headless figure in a black hoodie floating outside her 12th-floor apartment window. The figure was waving its arms and legs, which deeply frightened her.
Wu Lili died of a heart attack two days later. She was found slumped in her chair at her computer desk, with her eyes rolled back, indicating a sudden and fatal cardiac event.
The apartment gained a reputation as a 'haunted house' after Wu Lili's sudden death, following the earlier murder of another resident. This stigma made it hard to attract tenants, despite repeated rent reductions.
Despite being an atheist, Mr. Huo felt an eerie presence behind him while working late at night. Although he saw nothing when he looked, the persistent feeling of being watched led him to move out the next day.
The apartment remained vacant for a long time, as its reputation as a 'haunted house' deterred potential renters. The landlord eventually sold it at half the market price to a buyer willing to take the risk.