In Chang'an City, Yang Guang visited the Great Wall Mansion again, and forced Chen Shubao to tell the truth about the relationship between Gao Qinglian and Gu Paner, the leaders of the two roads sent to Northern Qi and Northern Zhou respectively at the beginning of the establishment of the "Wild Goose's Nest", and the possibility that Gu Paner was directly instructed by Chen Shubao's father, Emperor Xuan of Southern Chen, Chen Xuan, to pretend to surrender to the imperial court, thus solving the mystery that had been buried in his heart for a long time.

At the same time, thousands of miles away under the city of Baidaozhou outside the Guanwai, the general of the Sui army, Taiping Gongshi Wanzai Zhengqintong 20,000 horses and horses launched a fierce battle with the Western Turkic Nili Khan, who succeeded in the surprise attack on Baidaozhou, intending to recover Baidaozhou in one fell swoop and open a passage for the Changsun Sheng to send an envoy to the Turks.

Long before Changsun Sheng was ordered to leave Beijing, Shi Wansui had followed Shangshu's left servant to shoot Gao Ying's army from Youzhou in the east and rushed back to Bingzhou, until Changsun Sheng and his party arrived at Yanmen Pass, Shi Wansui's army and Nili Suobu had been fighting fiercely under the city of Baidaozhou for nearly a month, but they still failed to recapture Baidaozhou from the Turks.

In order to achieve the speedy recovery of Baidaozhou and form an effective shock to the Eastern Turkic Dulan Khan, who secretly gave support to the Western Turkic soldiers and horses in Baidaozhou City, Gao Ying decided to increase troops to Baidaozhou after consulting with Changsun Sheng, and planned to transfer Li Che, the marching governor stationed in the city of Bingzhou, to lead an army of 50,000 troops to urgently reinforce Shi Wansui's department, so as to recover Baidaozhou within ten days and open a passage to Dujin Mountain for Changsun Sheng and his party.

The news spread to the Sui army camp outside Baidaozhou, which angered Shi Wansui, who had always regarded himself very highly.

Since his debut, Shi Wansui has slashed Apo Khan, followed Yang Su, the Duke of Yueguo, to quell the Jiangnan rebellion, and has never fought such a fiery battle in the past ten years: with 20,000 elite horse infantry coalition troops, he has been attacking Baidaozhou continuously for nearly a month, but he has failed to drive the Turks out of Baidaozhou.

Therefore, after hearing the news that Li Che's 50,000-strong army had set off from Bingzhou and rushed to reinforce him, Shi Wansui immediately ordered the officers and men of the three armies to launch another onslaught on Baidaozhou at all costs, and be sure to take Baidaozhou in one go before Li Che's reinforcements arrived.

An unprecedentedly tragic battle unfolded under the city of Baidaozhou with Shi Wansui's order.

The soldiers of the Sui army, under the cover of oil rushing vehicles and heavy stone generators, launched another round of onslaught against Baidaozhou.

However, after nearly a month of confrontation with the Sui army outside the city, the Turkic defenders inside the city seemed to have figured out the Sui army's usual method of attacking the city. When the Sui army used fire oil punching carts and heavy stone generators to attack the city, the Turkic soldiers defending the city bent their waists and hid in the battlements on the city wall, without showing their heads at all, and once the Sui soldiers rushed to the city wall, set up a ladder to prepare to enter the city, the Turkic soldiers defending the city swarmed out of the battlements, some used bows and arrows, and some picked up the stones that fell on the city wall, and shot at the Sui army under the city in a hurry, throwing it, and suppressing the Sui army that had attacked under the city wall to the death.

The battle lasted from the fifth watch of dawn to dusk, and although the Sui army had thousands of people successfully advanced to the base of the Baidaozhou city wall, it was always suppressed outside the city by the Turkic defenders on the city, and it was difficult to climb the city.

In order to avoid injuring the siege soldiers, it was difficult to use fire oil punches and stone machines to attack Baidaozhou.

Shi Wansui didn't say a word after hearing the news, and strode out of the big tent of the Chinese army without wearing armor, turned over his horse outside the camp gate, carried his sword and rode his horse, and came to the front of the two armies with seven or eight personal soldiers to check the situation of the battle between the two sides.

He stared at a pair of leopard eyes and watched as he moved, then pointed to a city wall about two or three miles away due east and asked Sima Dao, "Why don't you attack the city from there?" ”

"General, the Turks have dug two trenches outside the city that are deeper than Zhangxu, and planted many sharp logs in the trenches, and hundreds of soldiers have attacked the city from there a few days ago, but they stumbled and fell into the trench, and were pierced by the sharp trees in the ditch, and died in battle......"

"This must be because the defenders in the city are already insufficient, come with me." Shi Wansui let out a sneer, shouted an order, and led seven or eight of his own soldiers to rush straight to the section of the city wall where the trench was dug.

When he came to the front of that section of the city wall, Shi Wansui ordered the accompanying soldiers to carry tall torches, and saw clearly with the help of the firelight, but it turned out that this section of the city wall had been knocked open a hole about two zhang wide under the onslaught of the Sui army for several days, and after the Turkic defenders in the city found out, they had no time to fill this gap, so they found some dead wood and broken branches in the city to cover the gap, and went out day and night, and dug a trench about dozens of zhang long, three zhang wide, and two zhang deep outside the city wall, and inserted sharp wood in the trench. He wanted to use this trench to prevent the Sui army from attacking the city from here.

Shi Wansui carefully surveyed the gap in the city wall and the location and width of the trench outside the city, and then opened his bow and arrow on horseback, and tentatively shot an arrow at the gap, as he expected, after the arrow was shot, the shouts of the Turkic defenders were immediately heard in the gap in the city wall, as if he was summoning defenders from other places to rush here to reinforce and guard, to prevent the Sui army from attacking the city from here.

Shi Wansui listened to the sound of the argument, and deduced the strength of the defenders here according to the size of the movement in the gap, so he smiled and ordered the whole army to suspend the siege, and led his own soldiers back to the Chinese army's big tent.

Sima was quite puzzled by Shi Wansui's military order to suspend the siege, and couldn't help but remind him: "General, we still have thousands of people who have attacked the base of the city wall, so what should they do if the siege is suspended at this time?" ”

"I ordered someone to bring them some wine and meat while it was dark, and then we would eat when we were full." Shi Wansui actually did not order the thousands of Sui soldiers under the root of the city wall to withdraw to the barracks, but just ordered someone to send them wine and meat to eat, seeing that Sima was full of confusion and still wanted to speak, Shi Wansui smiled mysteriously, and ordered, "Spread the order to the whole army, the second watch to make food, and the third watch to attack the city, and launch a fierce attack on the city with the direction of the thousands of people who attacked the root of the city wall." ”

Only then did Sima understand Shi Wansui's true intentions, and immediately took the order with his fists, and personally went out to convey the military order.

Just after the third watch, the shouts of killing outside the barracks sounded immediately, and the Sui army launched an attack on Baidaozhou again.

Shi Wansui drank and ate enough in the tent, did not call a single soldier, quietly slipped out of the camp, grabbed a knife and mounted a horse, rode alone, and rushed straight to the section of the city wall that opened the gap. When the horse came to the edge of the ditch outside the city, Shi Wansui reined the horse, only to hear a long neighing from the horse, and jumped over, actually crossed the ditch, and rushed straight to the gap in the city wall.

In the gap, most of the attention of the Turkic defenders was attracted to the direction of the Sui army's frontal attack, and suddenly heard the neighing of war horses from the trench outside the city, and was ready to open the bow and arrows.