This chapter answers Qin Guli’s questions on countering earthen siege mounds, covering beacon signals, ration standards, scorched-earth rules, hostage systems, equipment management and five fatal flaws for city defense.
This chapter outlines Mohist countermeasures against enemy water sieges, including terrain surveys, inner drainage ditches, and paired assault boats. Elite sappers with hostage families sabotage outer dikes under crossbow cover.