"Rest assured, Young Master. Nanpi is close to a tributary of the Zhang River." Lu Xiang took a deep breath and pointed respectfully at the moat. "The moat outside the city is a full ten meters wide. Just this moat alone is enough to hold Guan Yu back for half a month."
"Oh? Why is that?" Yuan Shang asked curiously.
"There are only two ways to cross a moat. Either use enough lives to fill it and create a passage wide enough to cross, or slowly fill it in with sand and stones. But Guan Yu's army hasn't conscripted the surrounding civilians."
At this point, Lu Xiang smiled disdainfully. "Liu Bei has established himself in this world on the foundation of 'Benevolence and Virtue.' Naturally, he can't conscript the surrounding civilians. That being the case, whether they fill the moat with human lives or gradually create a passage with sand and soil, they simply don't have enough soldiers."
"With only a few thousand men, they'd need to use those vehicles as cover while filling in a passage wide enough to cross. They can forget about doing that in less than ten days. Our moat connects to the Zhang River, whose waters flow relentlessly. Ordinary sand would be swept away at once. To fill it in, they'd need huge boulders, but merely gathering those boulders would take who knows how long."
"The fact that Guan Yu's army hasn't made a move these past few days must be because of this."
"If Guan Yu's army can't cross, why did we prepare so much?" Yuan Shang asked, determined to get to the bottom of things.
"The moat can stop ordinary soldiers and keep the main army from crossing, but a small number of elites can still break through. Whether they use a floating