After getting the Space ring with the cores. Zhu Tufu stood in place and thought about the information the Qi Cultivation Method 'Bloody Devourer' gave to him.

[I still can't believe something like this thing called Void Center really exists.]

The Void Center is what you could call a growing black hole. It is first constructed by hundred cores which are of the lowest quality and the Blood Qi as a starting point. You need to shrink all these hundred cores into a golf ball sized vortex which is almost invisible with the help of your Blood Qi. After that you would have the ability to gain the Innate ability by devouring it's heart, flesh and blood as previously mentioned and you could also devour beast cores, poison, toxic,  or any other thing which would harm or kill a normal Cultivator. Meaning beast cores, poisonous herbs wouldn't need to be refined into pills to get rid of the impurity or poison inside them, but could be devoured whole, which in turn would help grow the vortex with the impure, harmful stuff and it would nourish your body with the pure, nutrious stuff.

You needed the worst cores and Blood Qi, because the cores are the most easiest to shrink and the Blood Qi was one of the few Qis which were heavier than World Qi which means you would have a easier time shrinking them.

But there was only one drawback and that is you needed to be at least as tall as an adult, open at least ten merdians and a lot of willpower, because the body of a child doesn't have wide merdians like an adult to manipulate the Qi inside and you would need to endure the pain and suffering from shrinking the cores inside your body. It's so painful like when you are going to be skinned alive and then thrown into boiling water.

After thinking of the information about the Void Center inside his head and how to start. He sat in a crossed legged position on his bed and he slowly started to grow until he was five feet tall(1).

(1): 152 centimeters or 60 inches

[The 'Dwarf into Giant' battle technique really did widen my merdians as I thought! But it still isn't wide enough.... wait it said i needed to open ten merdians to work while I have all twenty merdians open. Maybe I can use quantity over quality?]

Thinking over it, he took out a hundred cores from the Space ring. 

[Well let's try or else I would need to wait until I hit puberty to have wide merdians with the 'Dwarf into Giant', if it doesn't work at worst i will get a vital injury and the hundred cores will get destroyed.]

The cores all flew into his abdomen while the Blood Qi flowed from his twenty merdians into his body and then gathered near his abdomen too. Zhu Tufu slowly gathered the cores in the middle as much as possible and slowly but steadily manipulated his Blood Qi to push them together.

[And here comes the pain fu*king bullsh*t!]

He cursed inside his heart and then slowly felt the pain intensify by two times and then four times and then more and more as the cores slowly shrank into a baseball sized core. His teeth were already clenched together from the pain.

[Now i need to spin the baseball sized core really fast while shrinking it. How can this pain possibly beat the pain I felt in my 214 years of my past life?!]

The baseball sized core slowly started to spin while also slowly turning into a tennis ball size and then getting smaller and smaller.

The narrative has been stolen; if detected on Amazon, report the infringement.

.....

After some hard dedication, the spinning core which was as small as a golf ball started spinning wildly and after some seconds later there was no longer a core, but an almost see through vortex.

[Finally, it seems I was successful! How lucky or a hour more and I would have fainted from the pain.]

Thinking this Zhu Tufu opened his eyes and his body slowly shrank back into his original size. He looked out of the window only to see that the sun was almost in the middle of the sky.

[It seems I cultivated the whole night and morning. No wonder my stomach is starving. I should take a bath and then eat lunch.]

Thinking this Zhu Tufu stood up and noticed that he no longer had clothes on. When he looked at his bed,  he noticed pieces of his black clothes. 

[I probably ripped it apart as I was growing.]

No longer thinking about it he walked into the shower, washed himself and went into the kitchen to see food on the table and a note beside it saying.

"I didn't want interrupt you while you were cultivating so make your lunch ahead of time. I went out for some business and will come home after two days so don't worry, if you are hungry ask the guards to take you to some restaurants to eat. Money is with the guards so don't worry about it and remember don't be too late outside. Love grandma."

Reading the text Zhu Tufu felt worried about his grandma. 

[Again with this feeling of kinship, I still can't control what the body instinctively feels. If I had gained this bodies memories then I would express them too. But i didn't, actually it's kind of weird that I didn't.]

[I heard that the Buddhists always reincarnated into a fetus and when they grow older they have a chance to remember their past life, but some of them don't even know what reincarnation or Buddhism even is. But I reincarnated into a six year old boy with my memories unlike the Buddhists which have a chance to remember them? How weird. What could cause such a thing as reincarnation?]

Thinking about it he suddenly remembered the distant past when he was adventuring with his Master, Junior sister and...him...

.....

There were four people riding on horses in a plain land.

"Master where are we going this time? Are we going to the next city to help more people?" Asked an innocent and sweet voice. It was a cute looking young girl. She looked like the little girl in the neighborhood who everyone liked and found adorable. Her height was around five feet four inches(2).

(2): 64.2 inches or 163 centimeters

"We are going to a village. It is said that people are mysteriously disappearing and the only thing they leave behind is there clothes and belongings which they had on." Answered a man strictly. He looked like a middle aged man with long brown hair. His eyes shone with wisdom and knowledge.

The girl shrieked and a well build average looking young man with black hair riding next to her teased: "Master don't scare our little Yani she is still too young for horror stories. Hahaha."

Yani pouted and said angrily: "Hmpf you are scared of horror stories. I was just surprised that's all. And just to let you know, next year I am going to be 19 years old."

The young man teased again: "Haha with these small breasts you have, you look like a 16-17 year old girl."

Yani embarrassed and angrily got closer to him with the horse and was hitting him with her right hand while riding the horse with her left hand saying: "Pervert! Pervert! Pervert! How dare you say that my breasts are small and how dare you look at them!"

The young man jokingly replied: "It's not like I had something to look at hah-aw aw-w Ok, Ok I apologize. I don't dare. I don't dare anymore okay? Just please stop hitting me anymore Hahahahaha..."

Another young man with a kind smile on his face  interjected and said: "Ok you two stop playing around. Junior brother Fu you should stop always teasing Junior sister Yani or else she will no longer like you."

Yani's face turned bright red and stopped hitting Fu and said embarrassed: "Senior brother how could you say something like this. Who would like a guy who is lazy and so perverted as him hmpf."

Fu blushed too and stopped teasing Yani.

After some seconds of awkward silence.

The man with brown hair said: "We are almost there. When we arrive we will split up. I will go with Zao Leilei to find some clues while you two love birds go and ask the people living there for details."

Fu blushed again while Yani's face which was returning normal turned bright red again and said: "Master not you too?!"

The man with brown hair and Zao Leilei both laughed and went on.