This Chapter from The Art of War describe a conversation between King Wu and Jiang Taigong on assessing enemy strength and deception. Jiang Taigong stresses observation and understanding of various factors, including environmental signs and troop movements. He explains that a lack of activity and the presence of undisturbed birds in an enemy camp suggest a feigned fortification. Rapid, uncoordinated enemy retreats are identified as a weakness to exploit. Ultimately, the passage emphasizes the importance of strategic observation for successful military action.