The officers suggested to pile up earth to form small hills and replenish their equipment. However, Lü Meng disagreed: "It will take several days to build the hills and replenish our equipment. By then, the enemy would have reinforced their defences and their relief forces would have arrived, and we can't defeat them. The rainwater has flowed in, and the water level will subside if we linger on for days. By then, it will be very difficult for our ships to retreat and we may be in danger. As of now, I observe that the fortress's defences are weak, so we can achieve victory if we attack it from all directions when our army's morale is still high. We can retreat via the water route after that. That's the way to secure total victory." Sun Quan heeded Lü Meng's suggestion.