In April of the second year of Jingkang, the Jin soldiers captured Hui, the second emperor of Qin, the concubines, and the clan to the north, and at that time, only Zhao Gou, the king of Kang, who organized soldiers and horses in Hebei, and the abolished Meng clan of Zhezong, survived. In May of the second year of Jingkang, Zhao Gou ascended the throne in Yingtianfu in Nanjing, and changed the second year of Jingkang to the first year of Jianyan, which was for Song Gaozong. Historically, the Song Dynasty after Gaozong's accession to the throne was called the Southern Song Dynasty, and the capital was later set in Lin'an.

Zhao Gou was the leader of the surrender faction in the early Southern Song Dynasty, and he shared the fear of war with the Jin dynasty like his father, brother Hui, and Qin Erzong, and blindly sought peace and peace in order to maintain the emperor's power. Wang Boyan and Huang Qianshan, whom Zhao Gou trusted, are also those who advocate escape and surrender.

In order to win the hearts of the people, he once used Li Gang, who had a high reputation for organizing the Kaifeng defense war, as the prime minister. Soon after, because Li Gang resolutely fought the main battle and did not conform to his wishes to negotiate peace, Li Gang was only allowed to serve as prime minister for 75 days, and Li Gang was dismissed as an official.

When Zhao Gou heard that the Jin Dynasty had arrived in Heyang under the pretext that the puppet Zhang Bangchang had been deposed, he did not ask whether the news was true, and immediately prepared to flee south, starting from Nanjing in early October and fleeing to Yangzhou at the end of the month. In December, the Jin Dynasty divided its troops into three routes to the south, Wanyan Zongfu led the East Road Jin Army to cross the river from Cangzhou and attack Shandong, Wanyan Zonghan led the Middle Road Jin Army to cross the river from Heyang and attack Henan, and the West Road Jin Army was led by Lou Room sent by Wanyan Zongwang to attack Shaanxi.

In February, the Jin army attacked Yangzhou, and Song Gaozong fled in a hurry and arrived in Hangzhou through Zhenjiang Mansion. In September, the Jin soldiers crossed the Yangtze River to invade, and Zhao Gou led his ministers to flee south, and then fled to Yuezhou in October, and then fled to Mingzhou, and from Mingzhou to Dinghai, drifting on the sea, until the summer of the fourth year of Jianyan, after the Jin army withdrew from Jiangnan, he returned to Lin'an Mansion.

In September of that year, the Jin State appointed Liu Yu as the Emperor of Great Qi and established a puppet government to rule most of Henan and Shaanxi to confront the Southern Song Dynasty. In the face of the invasion of the Jin Dynasty, although the supreme ruler of the Southern Song Dynasty pursued a policy of surrender on the knee, the people of the Song Dynasty rose up to resist the brutal capture and plundering of the Jin army, and the main soldiers within the Song court were also active in the forefront of the resistance against the Jin. Such as Han Shizhong, Yue Fei, Wu Jue, Wu Lin, Liu Qi, etc., they fought against the Jin soldiers in various places and recovered some of the lost territory.

During this period, the Song army fought a number of major battles, such as Han Shizhong's Battle of Huang Tiandang, which defeated Jin Wuxuan's 100,000 army for 48 days with 8,000 manpower, and Liu Qi's Shunchang victory, defeating Jin Wuxuan's army of more than 100,000 soldiers with less than 20,000 men. Others, such as the Battle of Monk Yuan, the Battle of Xianren Pass, the Battle of Dayi, etc., all the generals made the Jin soldiers suffer a lot, which greatly boosted the morale of the soldiers and civilians of the Song Dynasty. Among the anti-Jin generals of the Southern Song Dynasty, Yue Fei's attitude towards the War of Resistance was the most resolute, and his achievements and contributions were the greatest.

Song Shenwu left the deputy army commander, Xiangyang Prefecture Dengzhou Suizhou Yingzhou Town Fu envoy, and Xiangyang prefect Li Heng and Suizhou Zhizhou Li Dao united with Zhai Cong of Fengniu Cottage in Yiyang County Northern Expedition puppet Qi Liu Yu. The puppet Qi troops defected one after another, Niu Gao, Peng Xi, Zhao Qi, Zhu Quan, Niu Bao, Zhu Wancheng and other armies were attached to Li Heng, Dong Xian, Zhang Xi, Dong Zhen and other armies were attached to Zhai Cong, and Hu Anzhong, the governor of Tangzhou of the puppet Qi Dynasty, was recruited and surrendered by Li Dao.

Li Heng, Niu Gao, Peng Xi and others recovered Ruzhou, Yingchangfu, Xinyang Army and other places. Zhai Cong, Dong Zhen, Zhang Xi, Dong Gui, Zhao Tong and others invaded Xijing Henan Mansion and executed Yin Meng Bangxiong of Henan of the puppet Qi who had stolen and excavated the imperial tombs of the Song Dynasty, but Liu Yu immediately asked the Jin army for help.

In March, Marshal Jin's Zuodu Supervisor Jin Wuxuan joined up with the 20,000 puppet Qi army led by Li Cheng, and fought with the Song army in Mushigang, northwest of Kaifeng. By October, Zhai Cong's Fengniu Cottage Base Camp in Yiyang County, Dengzhou, Suizhou, Tangzhou, Xiangyangfu, Yingzhou and other places were successively captured and fallen by the Jin army, Li Heng, Zhai Cong, Niu Gao, Dong Xian, Li Dao, Zhang Xi and others all retreated to Jiangnan West Road, and Peng Xi died in battle.

Li Cheng and Xu Yue of the puppet Qi contacted the rebels of Yang Mo and Huang Cheng who had seized Dongting Lake, and agreed to attack the north and south in June of the following year, and the puppet Qi army and Yang Mo's army advanced by land and water, went east along the river, and went to the middle stream of Zhejiang to rendezvous, eliminate the Southern Song Dynasty, and the two sides established the country and made peace.

As early as the strategy formulated by Wanyan Aguta and Wanyan Zonghan to destroy Liao in order to unify China and foreign countries, he established his goal of inheriting the dominance of Liao and making the surrounding countries submit to Jin. In the eyes of the Jin State, the so-called unification of China and foreign countries was not to occupy land and population and exercise direct rule, but to order the Quartet to make all the surrounding countries such as Song, Western Xia, Goryeo, Western Liao, and Mongolia submit to Jin.

At that time, the reason why the Jin State occupied the land of the two rivers of the Song State was also because of the important strategic location, and the capture of Shaanxi was also for this purpose. During the reign of Jin Taizong, after capturing Bianjing of the Song State, he established the puppet government of Zhang Bangchang and the Great Chu. After the fall of Zhang Bangchang and the Great Chu, after the establishment of the Southern Song Dynasty, it gathered part of the Western Route Army and the Eastern Route Army to attack the Southern Song Dynasty with all its might, in an attempt to eliminate the Southern Song Dynasty and re-establish a puppet government such as Zhang Bangchang.

However, due to the failure of the military operation to attack the Southern Song Dynasty, it was far from achieving the expected goal, and the anti-Jin activities of the northern people were very fierce at that time, so they planned to establish a puppet Qi government in the original part of the Northern Song Dynasty to rule, so there was the establishment of Liu Yu's puppet government of Qi.

Liu Yuzi Yanyou, a native of Fucheng, Jingzhou. During the reign of Emperor Xuanhe of the Song Dynasty, he was sentenced to the west road of the Song River and later migrated to Zhejiang. After the establishment of the Southern Song Dynasty, Gaozong went to Yangzhou, and he knew Jinan Mansion in Shandong Province because of the recommendation of the privy envoy Zhang Wei. Jin general tart lazy to attack Jinan, he killed Xiao general Guan Sheng and surrendered to the Jin country, Jin thought that Jingdong, Xi, Huainan pacification envoy, knew that Dongping Mansion and all roads and horses and infantry army were in charge, and controlled the armies outside the river. His son Liu Lin knew Jinan Mansion, and he had a close relationship with Jin Jiang.

It was the established policy of the Jin State to establish a puppet government to rule the Han land, and Tart Lazy supported Liu Yu and intended to make him the head of the puppet government. However, it was Wanyan Zonghan and Gao Qingyi who really proposed the formation of a puppet government.

The establishment of Liu Yu's puppet Qi government was fostered by the Zonghan group and also received the support of tart laziness. At that time, Liu Yanzong was dead, and the Privy Council in Yanjing was merged into Yunzhong, so Gao Qingyi had to preside over the establishment of the puppet Qi government.

On September 9, Liu Yu's puppet Qi government was formally established, which was a vassal government under the rule of the Jin State, that is, a puppet government that ruled the Han land on behalf of the Jin State. After Liu Yu became the emperor, he took Li Xiaoyang Quan Zuocheng, Zhang Cambodia Quan Zuocheng, and the servant of the Ministry of Officials, and his son Liu Lin led the soldiers and horses of Zhulu and knew Jinan Mansion, with his mother Zhai as the queen mother, and his wife Qian as the queen, Jianyuan Fuchang, and moved the capital to Bianjing in three years.

This is a feudal puppet government composed of some landlords and bureaucrats in the hometown of the former Song Dynasty, and the people who participated in the puppet government include Zhang Xiaochun, who guarded Taiyuan to resist the capture of the Jin soldiers and did not protect the evening festival, and most of them were bureaucratic landlords of the old Northern Song Dynasty. Militarily, he recruited some Song defeated soldiers and robbers, such as Li Qiong, Li Cheng, Kong Yanzhou, Xu Wen and others. This government had to obey the orders of the Jin State in everything, and acted as a military accomplice of the Jin attack on the Song Dynasty, and was a collection of some scum figures among the Song landlords and bureaucrats.

In the Song army, which fled to the Yangtze River after defeat, Li Dao, Niu Gao and others repeatedly appealed to Yue Fei and Jiangnan West Road to appease Zhao Ding, the ambassador. The Song court then incorporated more than 1,000 troops from Niu Gao and Dong Xian, as well as Li Dao, into Yue's army, and Zhang Xi was also placed under the command of Yue Fei; Zhai Cong was reappointed to the jurisdiction of the soldiers and horses on the Jiangnan East Road and became an independent army; Li Heng and Yue Fei were basically of the same rank, and he did not want to be subordinate to Yue Fei, and his 15,000 soldiers and horses were changed to Zhang Jun, who had a higher official rank.

In order to defeat the combined army plan of the puppet Qi army and Yang Mo's army, Yue Fei decided to fight Li Cheng first, then Yang Mo, first Xianghan, Xianghan recovered, Li Cheng lost the army and fled, then Yang Mo lost his support. In the imperial court, Prime Minister Zhu Shengfei supported this approach: "The upper class of Xiangyang, with Wu and Shu, if our army can get it, it can repel the bandits when it advances, and it can defend the border when it retreats. ”

Zhao Ding, who had just been transferred from Jiangnan West Road to the government to participate in political affairs, also supported Yue Fei: "The only person who can know the interests of the upper class military is Yue Fei." However, Xu Zhuan, the only member of the Privy Council, opposed the appointment of Yue Fei to send troops, and Liu Guangshi, who was guarding Huainan West Road, also asked to replace Yue Fei.

Because the original regular army and forbidden army had been broken up by the war, the Song court reorganized into a new regular army. Zhang Jun's department was organized into the Shenwu Right Army, and Han Shizhong's department was organized into the Shenwu Left Army, both of which were under the control of both. Wang Shu's department was formed as the Shenwu Front Army, and Chen Sigong's department was formed as the Shenwu Rear Army, both of whom were in control. Yue's army was in Zhang Jun's department, the military name was named Shenwu Right Deputy Army, and Yue Fei was the commander and stationed in Hongzhou. The soldiers and horses of Yan Xiaogong, the commander of the former Shenwu Right Deputy Army, belonged to the Jiangnan East Road Pacification Ambassador Division, and the vacancy was filled by Yue Fei.

The Song court also promoted Yue Fei's military attache to the rank of pro-guard doctor and Jianzhou observer, and was the Yaojun observer from Wupin. Xin Qizong, the commander of the Shenwu Deputy Army, was cut due to his ineffective suppression of the rebellion of Fan Ruwei in Fujian, and Yue Fei's right Shenwu Deputy Army was renamed the Shenwu Deputy Army and promoted to the commander of the capital.

Yue Fei was appointed as the governor of Zhizhou, and the pacification envoy and the governor of Jinghu East Road, and led the army and horses to Tanzhou, and Li Gang, the number one person in the main battle faction, was appointed as the Xuanfu envoy of Jinghu and Guangnan Road, and Yue Fei and other generals were assigned to Li Gang's subordinates to crusade against Cao Cheng, a bandit on Hudong Road. At that time, the strength of Yue's army was more than 12,000 people, Yue Fei garrisoned Jizhou with 2,000 people, and attacked Cao Cheng's troops with the rest of the more than 10,000 people.

In the battle, the Yuejia army had the advantage, but Cao Cheng's subordinate Yang Zaixing was extremely brave, first attacking the camp of Han Shunfu, the fifth general of the Yuejia army, cutting off Han's arm and dying, and then killing Yue Fei. However, Yang Zaixing was finally captured by the Yue family army, and was subdued by Yue Fei and became one of the famous generals of the Yue family army in the future.