Then, Li Yuan led his troops like a bamboo, all the way into the pass, even down Linfen, Jiangjun, to Longmen. In September, it then entered the east of the Yellow River (east bank of the Yellow River).

When Li Yuan arrived in Hedong, he couldn't march forward, he was stuck, and it turned out that he had met a fierce man - Qu Tutong.

Qu Tutong, the compound surname Qu Tu, the word Tandouba, Changli (now Jinzhou City, Liaoning) people. Northern Zhou Dynasty, Sui Dynasty, Tang Dynasty period of the famous general, his father is the Northern Zhou Dynasty Qiongzhou Thorn Shi Qu Tu Changqing, compared with Li Yuan, the background is not a little inferior.

But this benevolent brother surnamed Qu Tu not only has a few brushes in battle, but also a ruthless and tough guy.

"I'd rather serve three buckets of onions, than Qu Tutong", a folk proverb that circulates about him, it can be seen that he is really a ruthless person. Whoever can eat three buckets of green onions at once, must be crazy with spicy food, and would rather suffer this kind of suffering than have entanglements with Qu Tutong.

Li Yuan wanted to capture Chang'an, and when he met someone like Qu Tutong, he deeply experienced that God would not let him succeed in Chang'an easily, so wait for the hardships!

Li Yuan surrounded Hedong, Qu Tutong wanted to consume them, let Li Yuan "tease", and insisted on not fighting, there was a posture of wanting to kill Li Yuan alive.

Hedong couldn't be attacked for a long time, Li Yuan couldn't eat in a hurry, couldn't sleep, and wanted to personally lead his troops to attack Chang'an.

Li Yuan was also forced to take such a risk, at this time people were carried away, there was no reason at all, Pei Lin hurriedly stopped, and bitterly expressed his thoughts, "Chang'an, the capital of the Sui Dynasty, has been relying on Qu Tutong to hold on for a long time, only by defeating him and making him succumb can we truly break through Chang'an." If we rashly bypass Qu Tutong and take Chang'an directly, in case of an accident that cannot be broken, Qu Tutong will attack us with the main forces of the Sui Chamber, at that time, we will be passive by the enemy, and the chance of victory will be very slim. ”

Li Shimin, the male god among the male gods, immediately raised his hand to object, "I know that there is a truth: soldiers are noble and fast. At present, we are winning all the way, the world's heroes have joined, and the people's hearts are excited, we should strike while the iron is hot to conquer Chang'an. If you spend time with Qu Tutong here for a long time, and you can't take Chang'an in one go, the morale of the army will definitely be shaken. My suggestion is yes, a direct attack on Chang'an. ”

Li Yuan pondered for a moment and said: "Qu Tutong has many elite soldiers, and he is a well-trained soldier in the imperial court, but he is only more than fifty miles away from our army, but he has not come to fight, which is enough to prove that his situation is not optimistic. But Qu Tutong was afraid that the court would blame him, and he didn't dare not fight. If he personally leads his army across the river to attack us, then we will attack Hedong, and Hedong will definitely not be able to hold it. If Qu Tutong defends the city with all his troops, then we will tear down the bridge over the river. In this way, the front chokes him by the throat, and the back attacks his back. It was easy for Qu Tutong to be captured alive by us. ”

Therefore, Li Yuan proposed a third comprehensive strategy, "Part of the troops stayed to continue the siege of Hedong, and I personally led the troops to capture Chang'an." ”

In the end, everyone adopted Li Yuan's comprehensive suggestion.

Therefore, Li Yuan ordered Li Jiancheng, Liu Wenjing, Wang Changhui and others to stick to Tongguan and Yongfengcang (an important military granary of Chang'an City) to contain Hedong.

Li Yuan personally led the troops, crossed the Yellow River from Longmen West, and opened Chang'an, all the way majestic, high-spirited!

At this time, Emperor Yang Guang of the Sui Dynasty was enjoying the last good time of his life in Jiangdu, and no one bothered him for the time being, which was also comfortable!