Gu Qing was focused on nothing else and kept practicing the breathing technique.
There was a trace of white air rising from the top of her head, and she was covered in fragrant sweat.
Because every breath involves vibrations in the internal organs, which consumes a lot of physical energy.
Gu Qing's beautiful face gradually turned pale, but she continued to persist.
After a period of practice, she has gained some experience. The longer she persists, the better the training effect will be on herself.
Therefore, she persists to the best of her ability every time.
Su Yun nodded slightly, a trace of satisfaction flashed in his eyes.
After pondering for a moment, he took out the spiritual crystal he had just obtained.
"That's all, I'll give you a break today."
Su Yun muttered secretly in his heart, and then used his fingers hard.
"Crack!"
He pinched a gap in the spiritual crystal.
The next moment, traces of pure white smoke escaped from the gaps in the spiritual crystal.
Su Yun placed the spiritual crystal in front of Gu Qing.
The pure white smoke that escaped was immediately inhaled by Gu Qing between her mouth and nose, and spread throughout her body with the rhythm of her breathing.
Suddenly, the cells all over Gu Qing's body seemed to become active rapidly.
Waves of powerful vitality sprouted out.
Gu Qing originally had her eyes closed, focusing entirely on the breathing technique, but now she felt something strange in her body, and she suddenly opened her eyes.
"Su Yun, what are you..." Gu Qing looked shocked.
Su Yun looked serious and interrupted sternly: "Stop talking! Don't mess up your breathing rhythm and continue to use the breathing technique!"
When Gu Qing heard Su Yun's harsh tone, her heart skipped a beat and she didn't dare to ask any more questions.
She quickly closed her eyes, continued to breathe and exhale, and soon entered that state of mindlessness again.
As time passes slowly.
Even Gu Qing herself didn't know that a layer of black dirt was gradually seeping out of her skin.
This is a breakthrough in martial arts training. After the physical body undergoes transformation and sublimation, some of the dross and impurities in the body are expelled.
Easily, Gu Qing stepped into the realm of a first-grade warrior.
And this is far from over.
As Gu Qing continued to inhale the essence of the spirit crystal, and supplemented it with breathing techniques to absorb and digest it, her body continued to transform and improve.
Not long after, impurities seeped out of her body for the second time, and then for the third time.
And more than half an hour later.
The essence of the spirit crystal was completely consumed.
At this moment, Gu Qing's whole body was shaken, there was a crackling sound from her body, her body trembled sharply, and more black impurities seeped out of her body than the previous three times.
Waves of extremely solid internal energy are growing in the body, surging endlessly.
Fourth level martial arts!
In less than an hour.
Gu Qing jumped from an ordinary person who only knew some rudimentary fighting skills to a fourth-level warrior who had developed inner strength.