Under the rule of Ge Bo, the people of Ge were very miserable, and they could not be self-sufficient in food and clothing, and of course they could not provide food for the Bo people. So Tang sent people from the border of the Shang Kingdom to Gedi to bring wine and rice to the people who helped with farming, and the people who delivered the food were old people and children. Every time, Gober sent people to wait for the people who brought the wine and food in Gedi, and then snatched the wine and food, and threatened to kill him if he didn't give it. Once, a child went to deliver wine and meat, and because he resisted the robbery, he was killed by Gerber's men.

Tang saw that Ge Bo was desperate to be an enemy of the Shang State and could no longer use help to win it, so he led his troops to Ge Di to kill Ge Bo. Because Ge Bo was unkind, the people of Ge Guo had long been resentful, and everyone expressed their willingness to submit to Shang Guo when they saw that Tang had killed Ge Bo. Tang took possession of all the land and people of Ge and organized the people of Ge to engage in agriculture in order to develop agriculture.

Tang's action to destroy Ge Guo, not only did no one oppose it among the princes, but the princes accused Ge Bo of being unkind, and he was killed at his own expense. Some princes and the people of Fang State resented Xia Wei's tyranny, and also hoped that Shang Tang would go to conquer, and were willing to free themselves from the rule of the Xia Dynasty and submit to Shang Tang. There were also some princes and Fang Guo who voluntarily submitted to Tang, and Tang was courteous to the princes and Fang Guo who returned to him, and Tang at this time was obviously in the position of the leader of the princes' alliance and exercised the rights of the king. In this way, Shang Tang began with the crusade against Ge State, and gradually reduced the wings of the Xia Dynasty and weakened the power of Xia Wei.

Shang Tang chose the virtuous ministers Yi Yin and Zhong Yu (huǐ) as the left and right phases, and used Bodi as a base to actively govern the country and prepare for the destruction of the Xia Dynasty. Shang Tang's left phase Zhong Yu and right phase Yi Yin are two people whose backgrounds and experiences are completely different. Zhong Yu was a slave owner who had been an official in the Xia Dynasty for generations since his ancestors. Yi Yin was a slave who lived a wandering life since he was a teenager, and later became a slave to Shang Tang's wife, who sent him to work in the kitchen.

Yi Yin is very talented, and in order to make the soup discover, he deliberately makes the dishes sometimes very tasty, and sometimes very salty or very bland. Once, Tang questioned Yi Yin for such a thing, and Yi Yin took the opportunity to talk to Tang about his views on governing the country. Tang was amazed when he heard this, and knew that he was a virtuous man, so he exempted him from the status of a slave and appointed him as the right minister. From then on, under Yi Yin's planning, Tang actively prepared for the destruction of the Xia Dynasty.

Yi Yin and Zhong Yu are very talented, they saw Xia Wei's tyranny, cruelty to the people, did not care about production, only knew Yile, caused the curse of the people, the rebellion of the princes, they knew that the fall of the Xia Dynasty was not far away. The only way they want to relieve the suffering of the people is to support a powerful prince and thus overthrow Xia Wei's rule. They saw that the power of Shang was the most powerful among the vassal states in the eastern region, and they thought that Shang Tang was the most ideal prince, so they came to Shang Tang's side through different ways.

Tang was a wise king, and with the assistance of Zhong Yu and Yi Yin, he first managed his own internal affairs, encouraging the people in the Shang ruled areas to farm and raise livestock with peace of mind; Externally, Tang united the princes and Fang countries that were friendly with the Shang State. Under Shang Tang's benevolence and righteousness, as well as the instigation of Zhong Yu and Yi Yin, some princes successively rebelled from the Xia Dynasty and returned to the Shang Kingdom, and Shang Tang's power became more and more powerful.

Shang Tang first adopted a policy of winning over the people politically, and he launched a political offensive to expose Xia Wei's crimes of tyranny, laying the political foundation for the victory of the war. In terms of military strategy, with the strong assistance of Zhong Yu and Yi Yin, he skillfully planned to reduce Xia Wei's wings one by one, isolate the Xia people, and overthrow the Xia Dynasty in one fell swoop.

Yi Yin made a plan to Tang, and he personally went to live in the capital of the Xia Dynasty for a period of time to observe the situation of the Xia Dynasty. Tang prepared some local products and tributes, and sent Yi Yin as an envoy to the capital of the Xia Dynasty to pay tribute. Yi Yin came to the capital of the Xia Dynasty with his entourage, driving a carriage, and carrying tribute. He was in the summer capital and won the favor of Princess Xia. One day three years later, Meixi said to Yi Yin: Ji had a dream that two suns appeared in the sky at the same time, fighting each other, and in the end only one was left. Yi Yin thought that the time had come to destroy Xia, so he quickly returned to Shangdu and told Shang Tang.

Yi Yin said to Tang Xianji: Xia Dynasty since the founding of Dayu, has gone through more than 400 years, Xia King is the world's respected co-master, although Xia Wei is tyrannical and unreasonable, the people are resentful, but he is still prestigious among the princes, so you can't crusade against Xia Wei too quickly, only wait for the opportunity to act. After Yi Yin and Zhong Yu discussed, they offered a strategy to Tang, that is, they could not rush to send troops to attack Xia Wei, but also accumulate greater strength, continue to weaken the forces that supported the Xia Dynasty, and wait for the opportunity. Tang accepted Yi Yin's proposition and made active preparations.

Later, Xia Wei held an alliance meeting, but the country did not participate, and openly rebelled. Xia Wei sent troops to crusade against Youyi, and in the war, Xia Wei's elite division suffered serious losses. After Xia Wei destroyed the Youyi Kingdom, the contradictions within the ruling class of the Xia Dynasty intensified. Among the princes and Fang States of the Xia Dynasty, although there were many defectors, there were still many who supported the Xia Dynasty, and it was not without those who were loyal to Xia Wei. In the eastern region, there are three subject states that are loyal to Xia Wei, they are Wei, Gu, and Kunwu. The power of these three Xia Dynasty vassals was not small, and the region they were located in was relatively close to the Shang State. After Tang destroyed Ge, he conquered some unsubmissive princes and Fang states, but these three Fang states insisted on being enemies of the Shang state, and they monitored Shang Tang's activities and often reported to Xia Weida.

Tang and Yi Yin and Zhong Yu are determined to get rid of these three wings of Xia Ji. Just as Tang was preparing to attack Wei, Xia Wei learned that Tang was still continuing to conquer the princes and expand the power of Shang, so he sent envoys to Shang to summon Tang into the court. Tang did not refuse, so he came to the Xia royal capital with his entourage. When Xia Wei learned that Tang had arrived, he ordered Tang to be imprisoned in Xiatai.

When Yi Yin and Zhong Yu learned that Xia Ji had imprisoned Tang, they collected many treasures and beauties and offered them to Xia Ji, asking for Tang to be released. Xia Wei was a money-greedy and womanizer, and he was very happy to see the many treasures and beauties sent by the Shang Kingdom, so he ordered the Tang to be released back to the Shang Kingdom. Xia Wei's imprisonment of Tang caused a great panic among the princes and Fang Kingdom, and everyone came to the Shang Kingdom one after another, willing to help Shang Tang destroy the Xia Dynasty.