Running all the way like this, Li Shimin can be regarded as leading the defeated army back to Chang'an City.

When Li Yuan learned that Li Shimin led his troops back, he immediately felt extremely surprised, he had already sent Lei Punishment to him, how could he still be defeated so easily, could it be that the enemy army was really so invincible?

Although he said that he was puzzled, Li Yuan's speed of action was still extremely fast, while sending people to collect the troops and horses, and on the other hand, asking Li Shimin to come to the palace to visit, he really wanted to understand what happened to him.

After being summoned by Li Yuan, Li Shimin looked ashamed, and although he made a lot of efforts, he still retreated. This is a given result that no one else can change.

Thinking of the matter of Tongguan, Li Shimin was inevitably a little disappointed, but after groaning, he still figured it out. Since the outcome cannot be changed, choose to face the reality.

No matter how he sees Li Yuan, he will be treated, whether it is a scolding or something else. This is all taken for granted, Li Shimin did not mean to shirk, and went straight to Li Yuan's hall.

Seeing Li Shimin, Li Yuan's expression was a little complicated, he originally had high hopes for him, but he never expected that he would be defeated and return so quickly. Li Yuan sighed helplessly, and said, "What happened in Tongguan?" ”

Although it was a little difficult to accept this result, Li Yuan obviously knew Li Shimin's ability, and if there was no accident, it would be absolutely impossible to lose Tongguan in a short period of time.

After all, the world knows that Tongguan is in danger, and it is not so easy to forcibly break it. Previously, the Snapdragon Army attacked Tongguan at night, which could only be regarded as an accident, and Li Shimin obviously would not make this mistake again.

Li Shimin was stunned for a moment, seemed a little hesitant, and finally explained to Li Yuan: "Before the enemy army withdrew from Tongguan, he left a back hand, and Erchen did not find out, giving the enemy a chance to take advantage of. ”

Hearing Li Shimin's reply, Li Yuan had mixed feelings in his heart, and he couldn't imagine that with Li Shimin's intelligence, he actually made this mistake and let the enemy easily break through Tongguan, which made people helpless!

Although Li Yuan was a little resentful, if he thought about it carefully, he couldn't completely blame Li Shimin, after all, Luo Cheng was known to be treacherous and cunning, and he also suffered a lot of losses.

After comforting himself, Li Yuan figured it out, anyway, Tongguan had already been lost, and if he continued to blame Li Shimin, it would be useless, it would be better to look at it and look for a turnaround.

It was Li Yuan who asked, "Well, I didn't expect that Yanyun thieves would be so treacherous." It's useless to blame you for this, and now the most important thing is how to deal with the enemy. ”

Li Shimin nodded, knowing Li Yuan's intentions, and said: "Erchen is going to Tongguan here, and I saw that Yanyun Luo Cheng commanded 300,000 horses, which was very elite, far surpassing the corporaries. ”

Li Yuan's eyes suddenly lit up, and he inevitably said with a little surprise: "How can this be, could it be that the Snapdragon Army actually has hundreds of thousands of people?" ”

Speaking of the elite division, the first thing Li Yuan thought of was the Snapdragon Army, after all, he had suffered several losses. Speaking carefully, he is a bit of a psychological shadow, which makes people uncomfortable.

Li Shimin shook his head and said: "According to Erchen's investigation, it was found that there were 100,000 Snapdragon troops among the enemy army, and although the rest of the soldiers and horses were inferior, they were also quite elite, far beyond the ordinary. ”

Li Shimin's reminder directly made Li Yuan's pupils shrink, because he knew that his son, it was impossible to exaggerate here, if the enemy army was really so fierce, then the situation would be a little bad.

Slowly exhaling a breath of turbid air from his mouth, Li Yuan calmed down his restless heart, looked at Li Shimin and said: "I see, no wonder Tongguan fell so quickly, apart from this matter, what else is the situation?" ”

After all, Tongguan, as the forward position of Chang'an, was the first existence to come into contact with the enemy. Li Shimin must have known a lot of information about the enemy's army, and it was necessary to ask for clarity at this time.

After speaking, Li Yuan suddenly felt that what he had said was not detailed enough, so he continued: "Didn't I have people send you the thunder punishment? Doesn't it work? ”

Speaking of thunder punishment, Li Shimin suddenly looked a little embarrassed, the reason why Tongguan fell was really inseparable from this thing. But now that Li Yuan is asking, there is nothing to hide, it's a big deal to tell the truth.

Li Shimin said: "The thunder punishment is indeed extremely powerful, but Luo Cheng is extremely cautious in his use of troops, and he is investigated all the way, and he does not fall into the trap of his sons at all, but Tongguan is victimized by him." ”

Li Yuan looked a little confused, the thunder punishment was not Li Shimin's, how could it harm Tongguan, it was really incredible. After listening to Li Shimin's detailed explanation, Li Yuan suddenly realized.

After some negotiation between the father and son, the atmosphere was a little solemn, and it seemed that their situation was already very bad. In the face of the elite division from Yan Yun, how can they resist it?

Originally, Li Yuan also wanted to use the thunder punishment as a secret weapon, and when the time comes, a wave of surprise attacks will definitely have a miraculous effect. But after listening to Li Shimin's words, he knew that this plan would most likely not succeed.

If that doesn't work, then what else can he do?

Seeing Li Yuan's solemn face, Li Shimin was thoughtful, and said in a deep voice: "Now that the enemy is persecuting Chang'an, Erchen is hard to blame, the power of thunder punishment is amazing, Erchen has an idea I don't know if it is feasible?" ”

Li Yuan was stunned, then nodded and said, "Shimin, what do you think, it's okay to speak out." ”

In fact, this is the gap, Li Jiancheng and Li Yuanji have a wave, and Li Yuan will treat them coldly. Although Li Shimin has failed many times, Li Yuan still trusts his skills.

Seeing that Li Yuan was not angry at this because of the defeat, Li Shimin immediately breathed a sigh of relief, and explained his thoughts: "Can my father have people set up a mechanism to put the thunder punishment underground, and it can be detonated without others igniting it." ”

Li Shimin learned the lesson of the last ambush and reminded Li Yuan. Li Yuan thought for a moment and said, "This method is really good, as long as the enemy army can't find the traces, it can naturally be led into the trap." ”

Li Yuan nodded and agreed, "I will let people do it, and I think it can be done before the enemy army arrives." I didn't expect the enemy to move so quickly, but it was only a few days before they reached Chang'an. ”

Speaking of this, Li Yuan looked a little embarrassed.

Li Shimin didn't know what to say, but he quite agreed with Li Yuan's words. Luo Mingming just wants to make a quick decision, with so many elites, I'm afraid it's most of Yan Yun's family.

Thinking of this, Li Shimin couldn't help but think of a question that was a little difficult to accept, but it was very likely to become a reality, if Chang'an was also lost, where should they go?

Previously, Li Yuan's foundation was in Taiyuan, but now he has pressed all his combat power in Chang'an. Once Chang'an is lost, I am afraid that the situation will be irreparable, what can they do.

Could it be that they want to defend Chang'an and block everything here?

Although Li Tang has been proclaimed emperor, in this short period of time, Li Shimin does not have much sense of belonging to Chang'an.