After fooling Yang Zhi, Yan Qing went to Yuncheng County, Zhang San specially told Yan Qing that he and Chao Gai had a relationship and had a very happy conversation.

In the next two days, Tong Guan in Yangzhou did not march, but after investigation, he seemed to be mobilizing ships near Jiankang and Gaoyou Lake in the north of the Yangzhou Canal.

As for Jiankang, Zhang San really didn't have anything to do, after Zhang San succeeded in several sneak attacks, Da Song also increased his vigilance, at least this time Tong Guan's scouts were sent out for thirty miles. There are also sailors from all over the country who patrol day and night.

Zhang San's plan to sneak attack the Dengzhou Navy Division is definitely very correct, until now Da Song Hai has not organized another Navy Division to compete for sea dominance, maybe it was really attracted by Yangzhou's attention.

The terrible human resources of the Great Song Dynasty are not only reflected outside the city of Yangzhou, but now more than 50,000 defenders have gathered in each city of Jiankang, Huzhou, Taizhou and other cities, and there is a tendency to further build.

This made Zhang San's soldiers dare not move at will, in case Tong Guan gave him a Ming Xiu plank road to secretly Chen Cang, wouldn't it be very embarrassing, but the bed crossbow was also a challenge for the Ryukyu Army, and the range of the standard three-bow bed crossbow of the Great Song Dynasty could exceed one thousand meters.

Moreover, the Great Song Dynasty has always used bed crossbows to fire incendiary bombs tied to arrow shafts, just like the first version of Ling Zhen's bed crossbow tied to bamboo incendiary bombs was inspired by the standard firearms of the Song Dynasty.

Although the fire oil used in the incendiary bombs of the Great Song Dynasty is the original version of the fire oil that has not been processed, and there is not much fire oil tied to an arrow. But it's also a small piece when it's burned, and there are a lot of these things in the Great Song Dynasty.

This time, Tong Guan estimated that he would concentrate hundreds of bed crossbows at a time, and if he really fought, the Yangzhou city wall was estimated to be shot into a hedgehog, and then he didn't even need a ladder, and the soldiers came up directly with the arrow shaft.

However, there is good news, the Great Song Bed Crossbow is basically not accurate if it exceeds 500 meters, and the range will be reduced to less than 1,000 meters after adding incendiary bombs, and if you want to shoot the Treadmill Arrow, which is used to climb the city, then you must at least push the bed crossbow to within 500 meters.

And the bed crossbow of the Great Song is wound slowly. The number of people needed is large, and it is a huge target, and Zhang San has a second-generation incendiary arrow with a range of more than eight hundred meters. Moreover, Zhang San has the advantage of the city wall, if the Song army on the opposite side shoots incendiary bombs, then the range is similar to his side.

For this reason, Zhang San is demolishing the houses within 200 meters of the city wall of Yangzhou City in the past few days to avoid being affected and causing fires.

Zhang San's Yangzhou City is preparing, and the group of people who died in Huangnigang were also found, and after the identity was verified, it didn't take three days for Liang Zhongshu of the Daimyo Mansion to get the news, and Yang Zhi disappeared when everyone died, and fools would think that Yang Zhi did it, so Liang Zhongshu was looking for someone to inquire about the matter, and at the same time issued a sea fishing document to arrest Yang Zhi.

Zhang San's side has no time to manage Chao cover them for the time being, because Tong Guan is ready, tomorrow the Song army will attack the city again, this time Tong Guan mobilized more than 300 bed crossbows from the nearby city plus more than 300 brought from Tokyo this time, tomorrow it is expected that the Song army will attack the city from the south, west and north together.

This is the so-called siege of three missing one, the first is to break the determination of the soldiers in the city to defend the city, and the second is also because the east is too close to the canal, the Song army is vulnerable to two sides, in short, Tong Guan's determination this time is very great, it is estimated that Tong Guan is also afraid of delaying too long and wants to fight.

Therefore, people often say that war is a competition of comprehensive national strength, even in ancient times, this theory is also tenable, whether it is an agrarian nation or a nomadic people, the agrarian nation is very well understood, and all kinds of city defense equipment, human resources, etc. are the embodiment of national strength.

For nomads, it's just one person and one horse, where does the comprehensive national strength come from? In fact, every mobilization of the nomadic war is the whole country, and the mobilization of all adult men to ride war horses, war horses and sabers plus food for the expedition is also the full capacity of the nomadic state.

Think about how terrifying the war power would be if farming had this kind of mobilization? For example, the Great Song Dynasty has a population of 100 million, and mobilizes all adult males who can participate in the war, at least 20 or 30 million, right? Can such a number of people win?

However, the Great Song Dynasty only had more than one million soldiers, that is, a little more than one percent of the population, so everyone still competed in the war with the bonus effect of mobilization ability and comprehensive national strength.

Just like why Zhang San's Ryukyu only relied on an island of three million people to challenge the Great Song Dynasty, it was because Zhang San used his national mobilization to challenge one percent of the strength of the Great Song Dynasty, which is why Napoleon said that the sleeping lion was because of China's huge war mobilization potential.

In this battle, both of them thought that they had a trump card and were full of confidence, but unfortunately Tong Guan's information channel was not smooth, and when he thought he was sure to win, Zhang San taught him a good lesson.

Tong Guan set up the formation, placed the bed crossbow at a distance of 800 meters, and shot rockets on the city wall, of course Zhang San would not be silent, not only the large ballista could shoot special incendiary arrows at the same time, but also shoot 800 meters. And Zhang San also has a bed crossbow.

So looking at the messy formation and the lost bed crossbow, Tong Guan couldn't wait to order the soldiers to charge, but he still knew that if he did that, there would be no benefit except for the loss of the soldiers.

When Zhang San thought that this battle would end like this, Tong Guan did not retreat immediately, and kept shooting crossbow arrows at a distance of one thousand meters Anyway, the Great Song Dynasty has sufficient supplies, and Tong Guan plans to spend it with Yangzhou.

Zhang San also has a bed crossbow, but the distance of one thousand meters is the same as shit, but there are many people on the other side, no matter where he shoots, he can always make a contribution, since Tong Guan wants to consume Zhang San, he has to accompany him.

Fought until midnight, the opposite Song army suddenly shot several waves of crossbow arrows on the city wall and ignited a fire, when Zhang San and the defenders at the head of the city were surprised by the sudden rise of the Song army before reacting, it turned out that the Song army took advantage of the night to move the bed crossbow to a closer place.

It turned out that Tong Guan was trying to use the cover of night to give the defenders in the city a heavy blow, and the city was naturally not to be outdone, and immediately a large number of incendiary bombs roared down, but the Song army seemed to have made up its mind to make a meritorious contribution in a battle, and retreated without casualties.

However, from the firelight, it can be seen that the Song army dispersed the formation, which greatly reduced the effect of the attack on the city, and the night did limit the line of sight, and the casualties on the city wall began to increase.

Just as Zhang San was watching the battle of the crossbow bed under the city, suddenly the city found that there was movement near the moat, and a few ballistas went down, and it turned out that the Song army below was filling the moat.