Located in Xinjiang, Pu Shihai is a plateau lake, with an altitude of 1,500 meters, surrounded by undulating mountains, abundant water and grass, rippling blue waves in the lake, vast and misty. Locals say it's the sea, not only because of its large area, as far as the eye can see, about thousands of miles away, but also because part of the lake is salty; The western part of the Pu Sea is a silvery white area full of natural salt pans.

The sea of cattails is surrounded by vast pastures, lakes and mountains, herdsmen nomadic lakeside, felt houses, cattle and sheep flocks; But today, there is no singing, no smiles, and everyone's faces are full of anxiety, regardless of men, women, and children, they are busy relocating. Xue Yantuo is about to fight, it is said that the army on the front line is crushed for thousands of miles, and the 100,000 people who control the strings in Tuyuhun cannot stop the crazy attack of the Tiele people at all, and the forward of Tiele is said to be only a day and a half away from Pu Shihai.

The war on the grassland never cares about the gains and losses of a city and a place, even if the feng shui treasure of Pu Shihai is lost, as long as there are people, Tuyuhun can still make a comeback. What makes Fu Yun embarrassed is, in which direction should he retreat? Originally, the north formed an alliance with the Eastern Turks, but because of the affairs of the Chijin Turks, a letter of condemnation from the Great Sui made the Qimin Khan order that no one should have contact with Tuguhun.

Retreating to the south is the territory of the Dangxiang clan, Fu Yun is not worried about the loyalty of the ten departments of the party, but is worried that he will bring more than 100,000 soldiers and civilians over, can the materials, grain and grass be supplied? If you hadn't been killed by the Tielers, but tens of thousands of people had starved to death, it was a joke. Princess Guanghua rode on a jujube red horse, although she was forty years old, she still had an excellent demeanor wearing a veil, and persuaded her: "The king should retreat to the east, seeing Yang Guang admit his mistake, maybe it will be fine, I have already sent someone to Xiping County for help." ”

The famous king Liang Qu Cong said: "The king doesn't have to worry, now is the most tense time of the war, and the crisis is also an opportunity, the three tribes of Tianzhu are crossing the desert, once they get out of the desert, they are right behind the Tiele people, and they can fight with us back and forth." Xue Yantuo has only 60,000 elite soldiers in his country, and there is the threat of the Western Turks, so he will not dare to fight with us for a long time. ”

The famous king Liang Qu Cong is tall, his face is sharp, and he has an indisputable momentum when he speaks, even Fu Yun, who is the king, can feel that kind of pressure. Fu Yun understood that the famous king Liang Qu Cong was expressing his dissatisfaction with his henchman Murong Xiaojun, 100,000 elites, unable to stop 40,000 Tiele people, as for the whole clan to enter the battlefield, it was just a kind of rhetoric, if Tuyuhun's own people were defeated, without waiting for Da Sui and Tie Le to make a move, Dang Xiang Qiang would be able to rebel and replace him.

Fu Yun was a little hesitant, on the one hand, he arranged for the old and weak, women and children to retreat, and prepared to abandon Fu Qi City, and on the other hand, he concentrated the clansmen who could go to the battlefield in Pu Haidong City to receive the army withdrawn by Murong Xiaojun; Murong Xiaojun also seems to be waiting for the three tribes of Tianzhu to create a miracle, fighting and retreating on the thousand-mile-long front of the Pu Sea. In this way, it was supported for six days, but Fu Yun received a bad news that could not be worse, the three tribes of Tianzhu encountered a mirage in the desert, the army lost its way, and only a small part of them walked out of the desert and were defeated by the Tiele people.

Murong Xiaojun rushed to send a few survivors of the three Heavenly Pillars, and when Fu Yun asked, he knew that when the army was walking in the blazing desert, the dry weather made people tired, and suddenly found that in the desert far ahead, a lake appeared, and the banks of the lake towered palaces and temples, so he quickly ran forward. Walk through dune after dune, but lakes, palaces, and monasteries are still far away, flickering and flickering, flickering, and finally disappearing without a trace. Then the wind and sand rose until night, and the pedestrians could not open their eyes, and the army lost its direction, and these people walked out of the desert after the wind and sand stopped the next day, judging the direction according to the sun's irradiation.

Heaven is dead to me, Fu Yun felt a wail in his heart, and immediately ordered: "After Murong Xiaojun is broken, the whole army will retreat to Xiping County." ”

In June of the fourth year of the Great Cause, Tuyuhun Khan Fu Yun led his troops to retreat into the territory of Xiping County and sent an envoy to the Great Sui to ask for help. Emperor Yang Guang of the Sui Dynasty ordered the general of the left guard, Yuwen Shubing, to Pinglinqiang City, and the king Yang Xiong went out to pour the river to meet the Tuyuhun people. Seeing that the Sui army was strong, Fuyun Khan was afraid and did not dare to surrender, so he led his people to flee west. Yuwen Shu then led Ying Yanglang to chase Liang Yuanli, Zhang Jun, Cui Shi and others, defeated Tuyuhun in Mantou City, killed more than 3,000 people, and captured Chishui City again.

Fu Yun led the crowd to retreat to Qiunichuan again, Emperor Yang Guang of the Sui Dynasty personally conquered, divided the internal Shi Yuanshou Nantun Jinshan, the military department Shangshu Duan Wenzhen Beitun Snow Mountain, the Taifu Qing Yang Yichen Dongtun Pipa Gorge, the general Zhang Shou Xitun Niling, surrounded on all sides. The two sides fought fiercely for several days, Tugu could not reach, Fu Yun led dozens of horsemen to escape, named Wang Liang Qu Cong under the banner of Fu Yun, and stationed the military vehicle I am really mountain; Zhang Dinghe, the general of the right guard, went out to fight, and was beheaded by Liang Qu Cong in front of the battle, and the second general Liu Wujian immediately took over the army, fought hard for a day, broke Liang Qu Cong's army, killed hundreds of people, and captured more than 200 people including his princes, Shangshu and generals. After the famous king Liang Qu Cong fled, the fairy king Ma Zhong led more than 100,000 men and women to surrender and offered 300,000 head of livestock.

Liang Mo, the doctor of Guanglu on the left, and Li Qiong, the general of Yiwei on the right, were ordered to pursue Fu Yun, and successively encountered reinforcements brought by Murong Xiaojun and died in battle. Fu Yun led the remnants of Tugu Hun to the south to the Snow Mountain of Ering Lake, Yang Yichen led the army to chase and kill, and went out through the big bucket to pull out the valley, the mountain roads along the way were dangerous, the wind was obscure, the troops lost contact with a lot, and more than half of the soldiers froze to death, and finally had no choice but to retreat. However, the territory of Tuyuhun is 4,000 miles from east to west, and 2,000 miles from north to south is owned by the Sui Dynasty at this moment.