In the meantime, Guan Yu claimed to be leading an army of 30,000. He selected 5,000 of his best troops, led them to the upstream shallows located some 10 "li" away from Yiyang, and planned to cross the shallows at night. Lu Su held a discussion with his subordinates on how to deal with Guan Yu. At the time, Gan Ning, who had only 300 men under him, told Lu Su: "If you give me another 500 troops, I will go to confront Guan Yu. I assure you that Guan Yu will not dare to cross the waters when he hears of my approach. But if he does, I will capture him." Lu Su then chose 1,000 troops and put them under Gan Ning's command. Gan Ning headed towards Guan Yu's position at night. As Gan Ning expected, Guan Yu did not cross the shallows and instead ordered his men to make camp there. That place was thus named 'Guan Yu's Shallows' (關羽瀨). Lu Su invited Guan Yu to attend a meeting to discuss the dispute. During the negotiations, both sides stationed their soldiers more than 100 paces away from the meeting area, while the officers present at the talks were each armed with nothing more than a sword or blade weapon. This event is hence sometimes referred to as "attending a meeting armed with only a sword" (單刀赴會). Lu Su told Guan Yu: Before Lu Su could finish what he was saying, an unnamed person interrupted him: "Whoever has the ability to govern the land shall have control over it. Isn't it so?" Lu Su angrily rebuked that person in a firm and stern tone. Guan Yu drew his sword, stood up and said: "This is a state-level problem. We can't hope to understand it." He left after that. Wei Zhao's "Book of Wu" (吳書) provided more details on the meeting. Before the talks started, Lu Su's subordinates feared that Guan Yu would try to harm Lu Su, so they advised Lu Su against attending the meeting. However, Lu Su replied: "It's better for us to settle this dispute in a peaceful manner. Liu Bei may have acted against our lord's interests, but we haven't agreed on who is right and who is wrong. Do you think Guan Yu will dare to do something as rash as killing me at this point in time?" Lu Su then met Guan Yu, who told him:   Lu Su replied: Guan Yu did not respond to what Lu Su said.