Chen Guanqi, the Hexagram Master of Tianji

In order to save his sister, the protagonist Chen Guanqi uses the "Fire and Thunder Eater" hexagram to hack into the underworld's book of life and death system, but it triggers the "Firewall of the Law of Cause and Effect" in heaven, causing a space-time rift to appear in the tomb of Emperor Taizong of the Tang Dynasty. Li Shimin's NPC consciousness traveled to a modern stock trading forum, triggering the "Historical Undead Speculation in A-shares" incident.