Lord Xiang summoned Zhang Mengtian and told him: 'Zhibo is a man who is outwardly friendly but inwardly estranged. He has sent demands to Han and Wei but I alone refused -- he will certainly turn his army on me. Where can I safely settle?' Zhang Mengtian said: 'Dong Eyu was a talented minister of Lord Jian who governed Jinyang, and Yin Duo continued his administration. The legacy of their governance remains. My lord should settle at Jinyang.' The lord agreed and dispatched advance forces to Jinyang, then followed.
Upon arriving, he inspected the city walls and the stores of the five offices. The walls were in disrepair; the granaries had no stored grain; the treasury had no reserves; the armory had no weapons; the city had no defensive equipment. Lord Xiang was alarmed and summoned Zhang Mengtian: 'I have inspected the walls and all five storehouses -- none are prepared. How shall I resist the enemy?'
Zhang Mengtian said: 'I have heard that the sage's governance stores wealth among the people, not in treasuries. He cultivates moral instruction rather than city walls. Issue an order: let the people keep three years' worth of food for themselves and send any surplus grain to the granaries; keep three years' worth of money and send any surplus to the treasury; those with extra manpower should be assigned to repair the walls.' The lord issued the order that evening. By the next day, the granaries could not hold all the grain, and the treasury overflowed. Within five days, the walls were repaired and defenses fully prepared.
The lord asked: 'The walls are repaired, defenses prepared, money and grain sufficient, weapons more than enough. But what about arrows?' Zhang Mengtian said: 'When Dong Eyu governed Jinyang, the walls of the ducal palace were all built with reeds, mugwort, and thorn-bush cores, rising to a full zhang in height. Extract and use them.' They tested them, and found them as strong as the finest bamboo arrows.
The lord asked: 'Arrows are sufficient. But what about metal?' Zhang Mengtian said: 'When Dong Eyu governed Jinyang, the pillars in the halls of the ducal palace and guest quarters were all cast from refined copper. Extract and use them.' They did, and had metal to spare.
With orders established and defenses prepared, the armies of the three states duly arrived. They assaulted Jinyang's walls and fought for three months without taking the city. They then spread out their forces to encircle it and diverted the river to flood it. After three years of siege, the people of the city were living in treetop nests, hanging their cooking pots from the rafters. Food and wealth were nearly exhausted, and the officers were gaunt and ill.
Lord Xiang said to Zhang Mengtian: 'Food is scarce, resources exhausted, the officers sick. I fear I cannot hold out. I wish to surrender the city -- to which state should I surrender?' Zhang Mengtian replied: 'I have heard it said: if you cannot preserve what is about to perish, or stabilize what is in danger, then wisdom has no value. My lord, abandon this plan. Let me try to slip out and meet with the lords of Han and Wei.'
Zhang Mengtian met the lords of Han and Wei and said: 'I have heard the saying: when the lips perish, the teeth grow cold. Zhibo now leads you two lords to attack Zhao. When Zhao perishes, you two will be next.' The two lords said: 'We know this. However, Zhibo is by nature crude and suspicious. If he discovers our plot, the disaster will certainly fall upon us. What can be done?' Zhang Mengtian said: 'This plan leaves your mouths and enters only my ears -- no one else will know.' The two lords agreed with Zhang Mengtian on a plan for their armies to turn, and set a date.
That night, Zhang Mengtian was sent back into Jinyang to report the reversal. Lord Xiang received him with two bows, both fearful and overjoyed. After the agreement was dispatched, the two lords went to pay court on Zhibo and upon leaving, encountered Zhi Guo outside the camp gate. Zhi Guo was disturbed by their expressions and went to see Zhibo: 'The two lords' faces show signs of change.' Zhibo asked what he meant. 'Their bearing is proud and their spirits are high -- this is not their usual manner. My lord should strike first.' Zhibo said: 'My agreement with the two lords is firm. When Zhao is broken, we divide its territory in three. This is why they cooperate with me -- they will not betray me. The army has been at Jinyang for three years; any day now we will take it and enjoy the spoils. Why would they have other designs? Impossible. Drop this and speak no more of it.'
The next morning, the two lords again came to pay court, and upon leaving again encountered Zhi Guo at the camp gate. Zhi Guo went in and said: 'Did my lord reveal my words to the two lords?' Zhibo asked how he knew. 'Today when the two lords came out and saw me, their expressions shifted and their eyes fixed on me. They are certainly plotting. My lord should kill them.' Zhibo said: 'Enough. Do not speak of this again.' Zhi Guo said: 'This will not do -- you must kill them. If you cannot kill them, then bind them with greater rewards.' Zhibo asked how. Zhi Guo said: 'Wei Xuanzi's chief counselor is Zhao Jia; Han Kangzi's chief counselor is Duan Gui. Both can alter their lords' plans. Agree with the two lords that when Zhao is destroyed, each of these two counselors will be enfeoffed with a district of ten thousand households. Then the two lords' hearts can be kept from changing.' Zhibo said: 'Destroy Zhao and divide it three ways, and then also enfeof their two counselors with districts of ten thousand households each? My share would be too small. I refuse.'
Zhi Guo, seeing that his advice was not heeded, departed and changed his clan name to Fu.
On the appointed night, the Zhao forces killed Zhibo's dike guards and diverted the floodwaters onto Zhibo's army. Zhibo's troops scrambled to deal with the flooding and fell into disorder. Han and Wei attacked from the flanks, while Lord Xiang led his soldiers in a frontal assault. They utterly routed Zhibo's army and captured Zhibo himself. Zhibo was killed, his army destroyed, and his domain divided into three -- becoming a laughingstock for All-Under-Heaven.
Therefore it is said: greed, obstinacy, and appetite for profit are the root of national destruction and personal death.