After the sun rises the next day, the two banks of the Hulu River, which flows slowly, whether it is Xiaoguansai on the east side or Baicaoyu on the west side, are shrouded in a solemn and silent atmosphere.

The soldiers of the Tang army were all in ambush everywhere according to the deployment, and the horses were covered with wooden titles prepared in advance, and they were lying in the deep grass on the hillside that reached to their waists.

And in the barriers, beacons and pavilion areas of Xiao Pass, there are also 800 mule soldiers and their mounts.

On the surface, Xiao Guan and Baicao are full of calm, and birds are hovering comfortably between the mountains and river valleys, everything is the same as before, but secretly there is a strong murderous intention.

"When the team that destroys the sand castle comes, they will cast the same smoke of peace." Behind the wall of the beacon wall, Gao Yue whispered to the people beside him.

Half an hour, an hour, an hour and a half passed......

Gao Yue and the Tang soldiers in the entire ambush area waited stoically and quietly, hoping that the supply march route of the soldiers who destroyed the sand castle was the same as on the wooden tablet.

Finally, Gao Yue's hand lying on the mouth of the beacon battlement shook violently!

In the valley where Baicaoyu leads to the south, there is a chaotic and huge sound of footsteps, hooves, and the cries of livestock, which are getting closer, denser, and clearer.

"Cheap envoy, here!" The White Grass Army made Gao Gu say in a low voice and affirmatively.

Quickly, in Gao Yue's eyes, there was an endless stream of troops, with horses or calves in the middle, all carrying heavy cloth bags, which must be grain straw - Ma Chongying was also capable, his 60,000 soldiers could drive thousands of miles from Hexi, without carrying baggage, crossing the Yellow River to attack Yanzhou, inciting more than 100,000 party items around him as servants, but after all, people and horses still have to eat food, and now Ma Chongying is on the front line of Fangqu in Gyeongju, relying only on local looting, or the party's fall to provide supplies is not enough, so it can only be transported from Longyou and Huizhou for a long distance to provide suppliesto fill the gap.

The most important transit point is Wonju Sand Castle.

On both sides of the transport procession, there were sparse Xibo border guards in support, each riding on a horse, wearing a huge quiver and stone throwing bag clearly visible, holding a horse lance in his hand, Gao Gu crouched on the battlement and counted the number very carefully, and told Gao Yue with certainty that there were about one hundred and fifty people.

"These should all be Katsura." Gao Yue thought to himself.

And in the transport team, there were also many soldiers on foot, which must be Yong, or the Helongqiang Hus hired to protect them, because they were mixed with cattle and horses, it was really difficult to count the number.

The team traveled along the valley at the foot of Liupan Mountain, and gradually came to the foot of Baicaoyu, which was the only way to the north, and it was here that the transport team that destroyed the sand castle stopped, and the cavalrymen who were Gui were resting in their saddles, and the Yong men on foot sat on the side of the road, some were chewing millet and salt for the cattle and horses, and they were driving them in groups to the Hulu River to drink.

Suddenly, Gao Yue saw from a distance that in the middle of the team that had destroyed the sand castle, a banner made of cloth was erected with a long pole, and it was shaking at the Xiaoguan barrier where he was on the other side of the river.

"That's right, that's right, come here, give them a safe smoke, let them rest assured that they will pass through Baicaoyu." Gao Yue hurriedly shouted.

According to Shang Jiezan Mujian's regulations, every time he crosses Baicaoyu, the escort team that destroys the sand castle must raise a banner, and at this time, Xiaoguan Barrier should light different fireworks according to the regulations to report whether the road ahead is safe or not.

This group of Fanzi has made good use of the beacon line in Middle Earth since the Han and Tang Dynasties!

But this time, Gao Yue will do what he wants:

On the open ground under the Xiaoguan Feng Trench, there is a hoard of dried long grass bundled together, using different grasses to cast signals - the one that is burned during the day is called "Feng", and it is burned to the point of the grass, also called borage; The one that burns at night is called "flint", and it burns reeds, which is also called accumulation; Different numbers of beacons represent different military situations, and in addition, cow dung, horse dung, and sheep dung are mixed into the beacons, and the one that is lit is called wolf smoke, which means that the enemy is invading and war is about to break out, which is the most urgent warning signal.

"Report safety, burn three piles of grass during the day, and don't get into the dung." The soldiers of the White Grass Army stepped forward and placed three bundles of sherbets under the beacon platform.

Then Gao Gu waved his hand, and the soldiers on the platform lit the brazier on the orange tree at the buttress with a fire rope, and then knocked it down, and lit the bale of grass under the wall.

Sure enough, the sand castle destroyer on the other side of the river saw the light of the fire, and thought that there was no police on all sides, so they regrouped and swaggered into the white grass valley.

When the "tail" of this team was hidden behind Baicaoyu, Gao Yue quickly waved his fist!

Gao Gu next to him immediately stood up and announced that I would raise the five-color flag of the White Grass Army!

Soon, the cyan tooth flag was pulled up along the high pole, and then waved in the wind.

At this time, on the old platform of the Baicao Military City, many horses were densely erected, Ma Youlin's Shence cavalry and Liu Guoguang's Jingyuan cavalry, all in black clothes and black armor, suddenly appeared in front of the sand castle destroying convoy - the slightly curved river valley passage passed under this wide platform.

The leader of the leader, "Gui" from Xifan, raised the banner tied to the horse lance and shouted loudly, as if to convey the signal of "there is an enemy attack" - cattle, sheep and men and horses are running wildly in terror, but their activity area is caught by the cliffs of Liupan Mountain and the Hulu River, and they cannot move away, let alone launch a defensive formation.

The Jingyuan cavalry took the lead, many Tang soldiers raised their bows, pulled the strings to their ears, and roared out the spinning arrows in the gallop, followed by the Shence cavalry, they parted ways, galloping down from all over the platform, like a black shower rushing in front of them!

In the screams, the people and animals who were the first to be killed by the sand castle transport team were killed by arrows in an instant, "Abu, Abu! Several Gui men in armor waved their weapons in their hands, turned their horses' heads, and instructed everyone to retreat to the pass of Baicaoyu.

At this moment, about 20 Xifan cavalry consciously formed a defensive line, traversed in the middle of the road, and acted as the retreating soldiers and horses behind the palace, blocking Liu Guoguang and Ma Youlin's troops who swept down like a frenzy.

Are these people trying to stop us?

The wind-like Jingyuan cavalry and Shence cavalry ran and rushed down, and then they were greeted by Wu Duo throwing stones.

One of the Tang cavalrymen at the front, screamed miserably, the sword in his hand flew out upside down, he was hit by a stone on his forehead, he fell off his horse, and then fell to the ground, being jumped by countless horses' hooves, not knowing whether he was dead or alive.

This throwing stone was thrown by the Western Tibetan cavalry on horseback, and it must be known that wearing Wu Duo is not only the mediocre people of Western Tibet, but also many regular warriors like to use Wu Duo more than bows and arrows.

The Tang cavalry that charged down was furious, and slashed into the defense line behind the Xifan cavalry hall in groups, but the Xifan cavalry was not afraid, drew their respective swords and weapons, and the two sides collided and fought with their lives.