The undercurrent in Jiangzhou City is surging, and it is about to surge, of course, Xia Yu naturally does not know all this.

In last night's battle, Xia Yu strayed into it, but for Xia Yu, it was full of gains.

Speaking of which, even Xia Yu himself couldn't believe it, he just strayed into a battle, but he didn't expect it to be a great opportunity for himself.

Although there were some dangers during the period, I was fortunate to have passed it safely.

After Xia Yu killed the shirtless man, he found the rectangular box on the shirtless man's body, and when he opened the box, Xia Yu immediately knew what was in the box.

That's right, the box contained the materials used to improve the level of the Immortal Mansion, a thousand-year-old red wood with aura.

In fact, after the box was opened, this piece of red wood had been directly absorbed by the Immortal Mansion, which was why Xia Yu was able to immediately know that the box contained red wood.

At that time, after absorbing Chimu, Xianfu was upgrading his level, and Xia Yu was also improving his strength because of the level of Xianfu, and he was rapidly climbing towards the foundation building period.

And Xia Yu didn't know all this, so he didn't hide the aura on his body.

At that time, the eagle just woke up, and just felt the powerful aura emanating from Xia Yu's body, which caused the eagle to mistakenly think that Xia Yu had been hiding his strength before, and regarded Xia Yu as a senior of the masters.

Of course, with Xia Yu's strength at that time, for the eagle, it is not wrong to be a senior master, Xia Yu really deserves it.

At this time, Xia Yu was in front of the TV, and carefully looked at the picture announced by the Jiangzhou City Public Security, and he and the eagle were not found in it.

As usual, Xia Yu was ready to go to school after eating a nutritious breakfast made for him by his mother at home.

"Mom, Dad, I'm going to school. After saying hello to his parents, Xia Yu left the house in a hurry.

After Xia Yu left home, Xia Yu's mother said to Xia Yu's father: "Old Xia, have you noticed that Xiao Yu has changed recently?"

"Oh, I haven't paid much attention to this, I've been too busy at work lately, the two machines in the factory are always having problems, and I'm going crazy, what do you say Xiao Yu has changed?" Xia Yu's father asked after hearing his wife's words.

"I can't say it, but I always feel that Xiao Yu looks a little different these days, do you think it will be caused by too much study pressure?" Xia Yu's mother said with some concern.

"There is also this possibility, now is a critical moment, you must not be careless, blame me, recently only care about work matters, I don't care about the family, or wait for Xiao Yu to come back at night, I will communicate with him well?" Xia Yu's father said.

"Okay, then let's decide that first. Xia Yu's mother replied after listening to her husband's words.

The couple quickly packed up the dishes and went out to work.

Not far from Xia Yu's house, he found a place where no one was, and then entered the immortal mansion.

As for why he left the house and found a place where no one was there to enter the Immortal Mansion, Xia Yu also thought about it, he was afraid that he would enter the Immortal Mansion at home, in case his parents found out that he disappeared in front of them for no reason, it would not scare his parents.

So Xia Yu decided to use the way to school to find a place where no one was there and then enter the Immortal Mansion, which would be safer.

After entering the Immortal Mansion, Xia Yu's figure appeared directly in the hall on the first floor. Glancing at the main hall, Xia Yu found that the current immortal mansion seemed to be a little more agile than before.

But what exactly has changed, Xia Yu can't say for a while, and Xia Yu doesn't care too much at this time.

Then Xia Yu found the staircase leading to the second floor of the main hall according to the information in his mind, and at the end of the top floor of the staircase, a closed door appeared.

Walking to the door, Xia Yu stretched out his hand and pushed towards the gate, the gate did not move, and then, Xia Yu carried the true yuan in his body and pushed towards the gate again, this time the door slowly opened inward.

From Xia Yu to the foundation building stage, the true qi in his body has changed, and now what flows in his body should be called the true yuan.

What is the difference between True Yuan and True Qi?

True Qi operates in the form of a gaseous state in the body, and True Yuan is the true qi that has been continuously compressed, from a gaseous state to a liquid state, in layman's terms, in fact, True Yuan is a strengthened version of True Qi.

The external manifestation is that after the true qi leaves the body, it will not be able to control it, and it will quickly dissipate into the air, while the true yuan can be controlled within a certain time and range after leaving the body.

The difference between the Qi training period and the foundation building period is that the Qi training period is the true qi, and the foundation building period is the true yuan, the true qi during the Qi training period cannot be released, and the true yuan during the foundation building period can be released, and after the true yuan is skillfully used, it can even form Gang Qi outside the body to protect oneself.

From the Qi training period to the foundation building period, it can be said that there has been a large improvement in strength.

According to the speed at which other immortal cultivators improved their strength, if they wanted to reach the foundation building stage from the Qi cultivation period, it had taken two years for the fastest genius in the land of Shenzhou so far.

But Xia Yu has only been a day later, and he has reached the foundation building period from the Qi training period, which is really too terrifying.

If other immortal cultivators knew about it, there would definitely be countless immortal cultivators who were crazy to hunt down Xia Yu.

Of course, this secret is currently only known to Xia Yu himself.

After the gate opened, Xia Yu stood in front of the door, with an unobstructed view of the second floor of the Immortal Mansion.

On the second floor of the Immortal Mansion, three magnificent attics were erected, and the three attics were arranged in a zigzag pattern.

Looking in from the doorway, the attic located in the middle and the front is in the middle of the eaves of the pavilion, and a large ancient character is engraved.

Although Xia Yu didn't know that ancient word, in his mind, Xia Yu had already understood the meaning of that word and knew that it was a "Dan" word.

According to the meaning of understanding, Xia Yu undoubtedly knew the purpose of this attic, which was used for alchemy.

The pavilion on the left side of the Dan Pavilion is also engraved with an ancient character, and Xia Yu does not know this word, but after understanding, he knows that it is a "technique" word.

"Let's call it a practice room for the time being!" Xia Yu muttered in his heart.

In the attic on the right side of the Dan Pavilion, there is also an ancient word engraved, this ancient word looks more cumbersome, after Xia Yu understood it, he knew that it was a "device" word.

After looking at the three attics, Xia Yu probably knew the purpose of the three attics, from left to right, they were "practice room", "alchemy room", and "refining room".

Seeing this, Xia Yu couldn't help but sigh in his heart: The matter of cultivating immortals is really broad and profound, and only when it reaches the foundation building period can it be regarded as the first glimpse of the way to cultivate immortals.