With Xiao Zhu'er's help, Yu Chang'an's fortress was built in only three days, which was really a surprise.

The scale of the fortress was slightly larger than the one built on the Shuoyuan Plain, enough to accommodate the more than 5,000 Yellow Turban soldiers re-summoned by Xia Zhangjiao.

And because Xiao Zhu'er has always been there during the construction process, the restoration degree of the city building circle is extremely high, and a very strong city protection circle can be formed after the magic circle is operated, and the defense ability of the entire fortress is much stronger than the previous one.

Yu Changan didn't expect Xiao Zhu'er to be a formation mage, if it weren't for her special status, he really wanted to recruit Xiao Zhu'er under his command. After all, Zhang Jiao had mentioned before that he wanted to recruit some formation mages in the Chaos Land, and with the help of the indigenous formation mages here, he would be able to better build and repair the city.

Yu Changan understood that Xiao Zhu'er wanted to take the opportunity of this help to apologize for her father, so he simply didn't treat Xiao Zhu'er as a woman, and directly grabbed him and became a strong man, otherwise it would be impossible to complete the construction of the fortress in just three days.

During the construction of the fortress, other families in Anning City would send people out to investigate from time to time, to be precise, to monitor Yu Chang'an's movements. After all, Yu Chang'an and they have already shown enough combat power, they are a force that can affect the balance in Anning City, so naturally they can't worry about the big and small forces in Anning City.

When the fortress is built, naturally some people are happy and some are worried, of course, the people in the outer city want to see this scene, after all, a powerful force stays in the fortress near Anning City, once a swarm of insects attack, they can naturally play a great role, which is equivalent to defending the city for the people in the city.

And many forces in the inner city, whether it is the human race, the demon race, and the orc race, do not want to see the situation that Yu Changan wants to stay here for a long time.

Especially the families other than the Xiao family naturally don't want to see this, in their opinion, Yu Chang'an is another force arranged by Xiao Quan outside the city, once necessary, thousands of Xuanshi stationed in that fortress will swarm into Anning City to help Xiao Quan eradicate the hostile forces.

As a result, because of the existence of Yu Chang'an, the precarious situation in the original Anning City dissipated invisibly, and the Zong family was full of anger but did not dare to act easily, after all, their overall strength was not as good as the Xiao family, and after being ruthlessly calculated, they learned that Xiao Quan still had strong reinforcements outside the city, and if they wanted to force a war in such an unfavorable situation, it would be tantamount to self-destruction.

Yu Changan couldn't have imagined that he originally wanted to sit on the mountain and watch the tiger fight, but he unexpectedly made an outstanding contribution to the peace of Anning City, and when he learned that the Zong family did not plan to start a war with the Xiao family, the whole person was in a very bad state......

After the fortress was built, Xiao Zhu'er would occasionally come and go, Yu Chang'an knew that Xiao Zhu'er's frequent arrival had her own wishes, but there must have been Xiao Quan's secret instructions. Yu Changan was not very repulsed by this, but he also rejected Xiao Zhu'er's occasional idea of wanting to help the Xiao family.

Time passed day by day, and in the blink of an eye, ten days passed, and Yu Chang'an, who was guarding the fortress every day, seemed to be able to deal with everything calmly, but he was already anxious at the moment.

It had been halfway since the forty-day covenant he had made with Xie Bi'an, but so far he had not found the slightest hope of capturing Anning City. Even he did not hesitate to expose his target to Xiao Zhu'er to take the initiative to inquire about the city spirit, but what he got was only some innocuous rumors, after all, Xiao Zhu'er was not qualified to contact the secrets of the city spirit level.

The only change during this period of time is that the frequency and number of Zerg infestations have begun to increase, and according to Xiao Zhu'er, the number of insect swarms that have appeared recently has greatly exceeded the level of the past.

"Could it be that the Zerg in the Unknown Land are going to make some big moves?" On this day, after just repelling a wave of insect swarm impact, Yu Changan stood on the wall of the fortress and asked in a low voice.

"Probably not...... bar. Xiao Zhu'er replied uncertainly.

While the two were talking, Yu Changan saw that there seemed to be a dark cloud in the sky in the distance that was slowly moving towards this side. He slowly narrowed his eyes, pointed to the strange appearance of the distant sky, and asked, "Look over there, is that a dark cloud?"

When Yu Changan pointed to the "dark clouds" on the horizon and spoke, many people in the fortress also saw the strangeness over there, Zhang Jiao looked into the distance with his eyes half-open while pranayama, but after looking at it for a while, he suddenly widened his eyes and said, "Flying insects?"

"Flying insects?" Yu Changan was stunned for a moment, and when he looked over carefully, he was stunned to find that it was indeed the case, what was slowly approaching in the distant sky was not a dark cloud at all, but groups of flying insects gathered together.

"How can there be so many flying insects?" Yu Changan frowned deeply, although he had also encountered flying insects in the previous battle, but they were all very few, and it seemed that flying insects were also very rare among the Zerg.

"It's not just flying insects, it's also on the ground!" Lu Bu, who was originally resting, jumped onto the city and pointed to the ground in the distance.

It didn't take long for everyone to see clearly what was happening in the distance, and in people's sight, the overwhelming Zerg rushed over.

On the thirteenth day after the fort was built, a wave of insects struck.

The Great Tribulation.

"Quick, go back to the city!" After figuring out the situation, Yu Changan immediately said to Xiao Zhu'er.

"No!" Xiao Zhu'er refused cleanly, and then explained: "There are still places that need to be repaired in the fortress's protective array, and there are still some possible problems that must be taken care of by the array mage. ”

"There's Zhang Tianshi here, I don't need you. ”

"The Celestial Master doesn't know enough about this magic circle. Xiao Zhu didn't wait for Yu Chang'an to urge, and said: "Don't worry, I'm just here to help you repair the magic circle, if the city protection magic circle can't be continuously repaired, it will soon be completely broken." ”

Yu Changan cast an inquiring glance at Zhang Jiao, and received Zhang Jiao's affirmative reply: "Yes, the magic circle in the fortress must be repaired by someone, and with Xiao Zhu'er, I can relieve a lot of pressure." ”

Looking back at the overwhelming insect tide, Yu Changan finally had to nod and say, "Okay, you just stay here and help me repair the magic circle." ”

"When the insect tide recedes, I will pay the pole. Looking at Xiao Zhu'er with a smile on her face, Yu Changan said again.

"I don't need to pay for it, I ......"

"I said just use it, and get to work. Yu Changan said stubbornly, and then began to arrange various defense tasks.

This is the first time Yu Changan has encountered the insect tide after entering the land of chaos, and even in his recovered memory, he has no experience in fighting the insect tide, so he has been careful to deal with it.

It's just that when the insect tide completely advanced in front of his fortress, he knew that he still underestimated the power of the insect tide.

After having the previous experience of guarding, Yu Changan also knew how to fight the fortress defense battle.

Although the fortress as a whole is a huge magic circle, which seems to be invulnerable, the defensive ability of the protective circle itself has a carrying limit, and if you blindly use the defensive ability of the circle itself to resist the impact of the enemy, it will soon be completely overwhelmed.

Therefore, it is necessary to help the magic circle reduce the burden, and the method used is naturally the one that was often used before, putting the Zerg into the magic circle from some fixed magic circle entrances, reducing the power of the Zerg and impacting the city protection circle at the same time.

How much pressure the city protection circle needs to be relieved depends on the enemy's attack power, if the enemy is too strong and there are too many of them, it will naturally need to put in a large number of Zerg to pull them inside the fortress to destroy.

When the battle began, the three lines of defense erected in the fortress were quickly overcrowded by the Zerg, and even to this extent, it seemed that it could not completely reduce the burden of the city protection circle.

Yu Chang'an knew that Zhang Jiao, who was presiding over the magic circle, would definitely not go wrong, and the influx of so many Zerg inside the fortress in a short period of time could only prove one thing, that is, he had to do this.

Fortunately, the guards inside the fortress are sufficient at this moment, and the city protection array established with the help of Xiao Zhu'er is much more clever than the one on the Shuoyuan Plain, even when fighting inside the fortress, there are also many protective barriers, so that after the fight, the Yellow Turban Army soldiers have no protection at all to fight the big insects.

Lu Bu and they once again showed great power on the battlefield inside the fortress, and the two butcher-like guys of Ram Shu and Ucha completely let go of their hands and feet to slaughter, like Lu Bu, they could also refine their soul power after killing the Zerg, so these two butchers have always worked hard in killing insects.

In the tense battle situation, even Liang Jia, who had been trying to awaken the soul covenant in the body of the Dark Dragon, finally joined the battle, and with a pair of terrifying meat fists, she actually fought a scene that was even more exaggerated than that of Ram Shu and Uzcha.

At first glance, Liang Jia's fighting style is really very similar to Bai Qi's, they both fight with their fists and feet, and they all smash their bodies directly as long as their fists and feet touch insects.

The only difference is that Bai Qi has almost no aura exposed on his body in battle, while Liang Jia has a violent aura all over his body. However, in this kind of battle with bugs, it doesn't matter whether you can restrain your breath, so even if your breath skyrockets, no insect can block Liang Jia's punch.

Yu Changan can also easily kill any insect in the fortress, but it is still a little difficult to do it like Liang Jia and Bai Qi, according to his estimate, Bai Qi and Liang Jia's current combat power is at least at the level of green rank.

Under the leadership of Yu Changan and others, the number of insects in the fortress began to decrease at a speed visible to the naked eye, and during this time, Zhang Jiao still did not slow down the speed of letting the Zerg enter the fortress, which shows that they have withstood the most dangerous moment of the insect tide, at least for the time being, there is no need to worry about the danger of the city protection circle being shattered.

But at this moment, a sharp long whistle suddenly came from the sky, and Yu Changan looked up and couldn't help but be shocked by the scene in front of him.

"It's ...... What the hell?"