This chapter lays out a siege signal system: color-coded, pictorial banners for supplies/troops, plus graded drum and fire alerts tracking enemy advance stages, alongside strict gate tally rules and reward regulations for defenders.
This chapter records Mozi’s counsel to his devoted disciple Qin Guli on countering cloud ladders, detailing auxiliary walls, arrow slits, incendiary traps, ambushes and night psychological tactics to repel ladder assaults.