Humans, immortals, and demons signed a no-fight contract during the Battle of Jiuli, but those with ulterior motives took the opportunity to sow discord between humans and immortals, causing tension between the two clans. They refused to use ancient magic weapons to catastrophize the world. Qi Ruoyun and others finally sealed it to bring peace to the three realms.
Purpose: To criticize people for being suspicious of each other when things go wrong