This Chapter from The Art of War, specifically Chapter 24, "Dragon Strategy - Secret Talisman," detailing a conversation between King Wu and Jiang Taigong. The core discussion centers on establishing a covert communication system using eight differently sized "talismans" to convey urgent battlefield updates. Each talisman's length signifies a specific military event, ranging from major victories to significant losses. Strict secrecy and severe punishment for leaks are emphasized to ensure the system's effectiveness. The system aims to maintain efficient communication and logistical support during deep military incursions. The king ultimately approves of this strategy.