After returning to the cave, Lu Chen did not immediately hit the foundation, but adjusted his physical condition to the best.

On this day, according to the foundation building experience taught by Luo Ling'er, Lu Chen sealed his hands and urged the Qiyun Bead in the sea of consciousness with all his might, and the surrounding aura suddenly rushed towards Lu Chen, and in an instant, the cave was filled with a milky white aura like a thick mist.

Lu Chen's dantian began to tremble a little, and the aura in his body began to spread uncontrollably, and his qi and blood boiled even more.

Just relying on the aura condensed by the Qiyun Bead was far less than what Lu Chen needed to build a foundation, and when he took out the inferior Zhuji Dan issued by the sect, the fragrance immediately permeated the entire cave.

Lu Chen concentrates his energy, holds Yuan Shouyi, and swallows the Zhuji Dan in his mouth, which melts in his mouth, which not only contains a large amount of aura, but also has strong medicinal power and strong aura, which can immediately wash the body, discharge the toxic gas waste in the body, and make the muscles and veins more tenacious, so that it is easier for people to break through to the foundation building period.

Lu Chen urged the spiritual power to dissolve the medicinal power, and the majestic spiritual power surged into the meridians everywhere, and formed a small spiritual power vortex at the dantian.

Lu Chen hurriedly followed the foundation building exercises issued by the sect and Luo Ling'er's experience, sealed his hands, and while continuing to refine the medicinal power of Zhuji Dan, he urged the Qiyun Bead to continuously absorb the spiritual energy, press it into small droplets, and then add it to the whirlpool.

Under the continuous attraction of this whirlpool, the spiritual energy in all parts of Lu Chen's body was quickly absorbed, and with the help of the spiritual power vortex at the dantian, it was pressed into a little bit of liquid, and then continued to return to the meridians of the whole body.

At this time, the spiritual energy in Lu Chen's meridians had been consumed, and the medicinal power of the first Zhuji Dan had basically been refined, but at this time, the liquid spiritual power had not yet filled Lu Chen's body.

Lu Chen did not hesitate to take out the medium-grade Zhuji Dan and swallow it, the powerful medicinal effect of the medium-grade Zhuji Dan was overbearing, forming a large spiritual power vortex at the dantian, and it rotated even faster. This time, Lu Chen had experience, quickly ran the exercises, integrated his medicinal power into himself, and unhurriedly guided the aura of his whole body into his dantian.

Lu Chen could feel that the spiritual power in his dantian had all been transformed into liquid, and every drop was filled with huge energy.

The medicinal effect of the medium-grade Zhuji Dan was perfectly interpreted, and Lu Chen gritted his teeth and continued to run the Qiyun Bead, constantly pressing the spiritual energy absorbed from the outside into a new round of spiritual power vortex.

Lu Chen meditated for ten days before the spiritual power in all parts of his body really underwent a qualitative change.

The main difference between foundation building and qi refining is the aura in the body, during the qi refining period, the monk absorbs the aura of heaven and earth, and converts it into spiritual power in the body. The monks in the foundation building period are transformed into spiritual elements, and this liquid spiritual element is a qualitative leap of spiritual power.

On this day, suddenly a warm liquid spirit element flowed through the meridians of Lu Chen's body, making him feel comfortable and couldn't help but moan softly.

"Finally, the foundation was successfully built, and with the help of this medium-grade foundation building pill, I broke through to the middle stage of foundation building in one fell swoop. Lu Chen finally breathed a sigh of relief.

Walking out of the cave and feeling the sunshine outside, Lu Chen stretched his waist for a long time.

"Senior brother, you can figure it out!" I saw a small head poking out of the cave next to her, and Luo Linger walked out.

"Well, the foundation building has finally succeeded!Thanks to the guidance of my junior sister!" Lu Chen's face was full of smiles.

"Hey, senior brother, have you broken through to the middle stage of foundation building?" Luo Ling'er stared at Lu Chen in surprise with a pair of beautiful eyes.

"That's right!" Lu Chen replied naturally.

"Originally, I thought that there were very few monks with excellent qualifications in Dongzhou, and it seems that Senior Brother Lu is an exception!" Luo Linger said with a smile.

"Senior sister praised it falsely!" Lu Chen was not proud of breaking through to the middle stage of foundation building.