Zhang Baoxiang and Xue Yimang looked at the bridge in front of him with awe, shocked for a long time and couldn't say a word.

The two of them watched the bridge with their own eyes and built it bit by bit.

There is no iron ingot, no lime, no stone strips, and even rope fixing is useless. It is just grafted with wood, and then the wooden bridge is made.

What's going on?

Is this a dream?

Is there such a bridge?

Not to mention that others could not imagine it, even if you saw Zhang Baoxiang, who had successfully built the wooden bridge bit by bit, Xue Yimang would be like a dream and could not believe his eyes.

What's the situation?

Half a day of logging, half a day of construction, and in one day, the wooden bridge was built?

They naturally didn't know that Li Yuanai used the method of building this wooden bridge to use the Muli Arm Bridge in the Snowy Villages in later generations.

The snowy area is mountainous, and the Tibetan ethnic groups live on the mountain.

In order to survive and to resist foreign enemies, Tibetans repaired fortresses and built fortifications. Finally, based on the Han people's arm-extending bridge, a unique defense method was invented... Muli arm-extending bridge.

They repaired the bridge piers at the entrance between the mountains. Each floor was about an inch apart, and placed a wooden strip across it to fix it firmly. Then, using scientific methods of hard work, they connected the wood to the wood, extending it into the river like arms, extending several feet into the river layer by layer, and finally putting several wooden poles on both sides on the two "big arms" to pass through.

For safety, Tibetans even used this method to build a wooden bridge during the day to walk for the villagers, and at night they would remove the wooden poles on it to prevent foreign enemies from invading.

This kind of wooden extending arm bridge does not require nails or ropes. It depends on the understanding of mechanics, and uses the strength of the bridge foundation and the grafting of wood to wood.

According to later physical mechanics experts, the grafting method of Muli extending arm bridge can float out of 30 meters in the extreme state. If more than 30 meters and insufficient force point will cause the bridge deck to collapse.

The Liao River is better than the turbulent turbulent, and the two sides are more than twenty meters long, within the extension range of the Extendant Bridge.

Seeing that Goguryeo destroyed the bridge deck, but did not destroy the bridge foundation, Li Yuanai came up with this method immediately.

The Muli Arm Extending Bridge looks difficult, but it is extremely simple to say. As long as a person who knows physical mechanics uses a few chopsticks to graft each other, he can create a simple bridge-like model.

The principle of Muli's arm stretching bridge is not much different from this.

As long as you understand the principles, this bridge will be extremely simple.

But if you don’t understand the key, you can’t even build it.

The grain truck slowly drove on the flat logs and crossed the Liao River.

Zhang Baoxiang was stunned for a long time, removed his armor and exposed himself. He came to Li Yuanai who was commanding the grain truck to cross the bridge. He knelt on the ground and kowtowed, "Zhang Baoxiang Menglang was ignorant and collided with the King of Shang. He didn't know that the King of Shang possessed Luban's magical skills and almost missed the big thing. He hoped that the King of Shang would forgive him, without any eyes."

Lord Li Yuanai did not take this matter seriously. Seeing Zhang Baoxiang apologizing to him so sincerely, the little bit of discomfort disappeared. He took off his cloak and put it on the general who sincerely admitted his mistake in front of him and said, "The commander does not have to do this. You and I have specialized in arts, but have different opinions. In short, fight against the enemy, put you first. Leave other trivial matters to me."

Zhang Baoxiang dared not to obey, and said respectfully: "I will obey the orders."

Li Yuanai helped Zhang Baoxiang stand up.

Xue Yimang knelt down and shouted, "The King of Shang is a real god. He has no nails or ropes to make a flying bridge. It is unheard of. Xue Yimang kowtowed to the god."

Seeing this, Li Yuanai laughed "haha" and then said calmly: "This is a small trick, not worth mentioning."

Xue Yimang and he admired him, thinking about his ignorant brother in Xue Yantuo. He had such a god-like man in the Tang Dynasty. He was provoking troubles randomly. Wouldn't he have self-destruction?

After the soldiers crossed the river, Li Yuanai asked someone to demolish the Liaoshui Bridge he built.

Xue Yimang asked inexplicably, so he asked: "King Shang, why is this? Isn't it a waste of effort to demolish the Liaoshui Bridge? Keeping it can benefit future generations..."

Li Yuanai smiled mysteriously and said, "This bridge was built temporarily and is not stable after all. Over time, there will inevitably be hidden dangers." He paused and expressed his real purpose: "Of course, the most important thing is to shock Goguryeo, let them think we were flying over with wings, and let them go suspicious."

In fact, he didn't say the most important thing.

The core stress point of this Muli Extension Bridge is the foundation of the bridge on both sides of the straits.

Just like building a house, only by building a foundation can we withstand the wind and rain.

The arms of Muli extending the arm bridge do not have a reliable force point, so the bridge foundation becomes the key.

If Goguryeo soldiers demolished the bridge foundation, then Li Yuanai would really not have the power to turn the world back.

However, the bridge foundation is the most sturdy, without special tools, and for three to five days, it is a dream to dismantle the bridge foundation.

It’s not that Li Yuanai doesn’t trust Xue Yimang, but he just doesn’t want to be troublesome.

The soldiers around were dismantling the bridge, and there were many people. If they missed the words, they would let Goguryeo's scouts and spies remove the bridge foundation of the Xiao Liaoshui in front of them. That would be awesome.

After demolishing the bridge, Li Yuanai and his group arrived in Liaodong City.

Li Shimin sent general Niu Jinda to guard Liaodong to ensure that Liaodong city is safe.

In Liaodong City, they took a short rest and changed to the wind wheelbarrow that they sent to the city first, intending to go to the hinterland of Goguryeo.

As they set off, Zhang Baoxiang came to report calmly: If as expected, no matter how the scouts from Goguryeo suspected, they still demolished the bridge of Xiaoliao River, of course the bridge foundation is still there...

However, there are no trees upstream of the Xiaoliao Water, so there is no way to transport wood from the upstream with the water.

This tree cut will inevitably delay for a long time.

Li Yuanai could only ask Niu Jinda for help.

Niu Jinda thought for a while and asked, "Is the marble viable? There is the marble vibrant in the city left by Goguryeo. Our army is moving too quickly, and they have not had time to use it all, and the city is broken."

Li Yuanai said without hesitation: "As long as it is a log!"

That's it, Li Yuanai crossed the only two canals that blocked them without any effort.

The two canals delayed the Tang army for a total of one and a half days...
Chapter completed!