Fantasy: The system takes me to refine the magic formula

"Hey, what's your name?" Long Tian looked at the little maid behind him and asked!

"Back to Master, I haven't named yet, please give me a name, Master!" The girl's obedient appearance made Long Tian suddenly feel a little pitiful!
"Look up and let me see what you look like! Don't keep your head down, and are you afraid of me?"

"No, young master, it's just that before I entered the mansion, someone told me what I should do and what I shouldn't do. As a servant, I can't look directly at you!"

"...and this particularity... Well, from today on, you'll be called Hongying! Seeing that the ribbon on your head is red, and you look a little heroic, let's call you Hongying!"

"Thank you, young master, for the name! Thank you, young master!"

"Okay! Let's go back first! If my guess is correct, you are also an ordinary person who cannot cultivate, right?"

"Yes! Young master, Hongying was an orphan from birth, she had a physical examination before entering the mansion, and she didn't have a martial spirit on her body!"

Back in the yard, Long Tian brought Hong Ying into the room and said.

"Follow the young master in the future, the young master may help you to open up your mind and practice, but you have to keep it a secret, otherwise we both have to die!"

"Ah..." Hongying was a little surprised and terrified when she heard the young master's words. The surprise was that her young master was an ordinary person without a martial spirit and couldn't cultivate. How could she guarantee that she could cultivate?
"Don't be in a daze! Make an oath first, I will teach you the method of cultivation. You must keep it secret and not use it at will. If you can't protect yourself, you must not tell anyone."

"Ah! It's the young master! Hongying swears that she will be loyal to the young master forever. If the young master does not allow it to be revealed, Hongying will never reveal to the outside world what she and the young master can cultivate!"

"Very good! From today onwards, you will be in charge of my daily life, and I will take you to practice for three hours every day. Your young master, I am about to enter the golden core stage now! You can't be too far behind!"

"Golden elixir...Golden elixir stage?" Hongying knew the meaning of a three-year-old child entering the golden elixir stage. It is a great ability, and it is even more impossible to enter the foundation building period!

"Well, it's almost time! Sit down, and under my instruction, feel the aura of heaven and earth first!" Long Tian closed his eyes and started the road of cultivation with Hongying. Of course, the system is behind all of this to help Long Tian, Because Hongying has a whole yin body, when Longtian helps Hongying transition the aura of heaven and earth, he will also be harmonized by Hongying's physique, which is also of great benefit to his own cultivation, and Longtian's dantian has always been inexplicably in In the vortex state, he can absorb the aura of heaven and earth on his own, coupled with the nourishment of the whole yin physique, allowing Long Tian to directly buy the threshold of the Golden Core Stage on his third birthday!

"Young Master! Hongying felt it! Now Hongying seems to have a strange energy nourishing Hongying's body!"

"Hmm! Hongying, go and sit next to me and try to slowly circulate the aura around you to your dantian. The young master needs to practice quietly now!"

"Yes!"

At this moment, Long Tian felt that in his dantian, where the aura of heaven and earth was the strongest, the spiritual liquid seemed to be gathering and merging in one place, and the vortex in his dantian was spinning faster and faster. Absorbing, at the same time the system is also helping Longtian to speed up the formation of the golden core!

In the afternoon, Long Tian's servant Ah Jin yelled twice outside the door, saying that Madam has an invitation, but Long Tian didn't respond, Ah Jin muttered a few words: "Young master is really..."

Until the sunset on the west mountain, Longtian's golden pill was finally formed. A golden golden pill the size of a dove's egg shone brightly in Longtian's dantian, and under the dantian was the aura vortex of the foundation building period. It also turned into a golden vortex, while absorbing spiritual energy autonomously, while nourishing Longtian's golden core!
"Wow! This is Jindan! System, how good am I now?"

"Well, you have the cultivation base of the golden core stage, and you don't have any combat power. I guess you can't beat your big brother!"

"What? I'm at the golden core stage now, can't beat him?"

"You need to practice!! You are at a high level now, but you haven't adapted well to your own level, and you can't use your strength well. This is your shortcoming! I suggest you go to the forest outside the city to exercise After all, the cultivation base of the Golden Core stage is also top-notch in Shengwu City! Apart from His Majesty Wu Guo and your parents, there are not many Golden Core stage monks here!"

"But if I go out alone, my parents won't allow it!"

"Host, you can fly out of the light in the golden core stage! They won't know if the light flies out quietly. It's good to go home after the experience! But I don't recommend you to bring Hongying, she just Start practicing!"

"Well, it's tomorrow. In the afternoon, Ah Jin said that his mother was looking for me, so I'll take a look!"

Long Tian opened his eyes and found that Hongying was looking at him with wide eyes: "How do you feel?"

"Master! Hongying can master it! I have already transferred the aura of heaven and earth you gave me to the dantian. It's fun. Before Hongying practiced, she never knew where the dantian was. The aura in it seemed to be conscious, and rushed to Hongying's dantian autonomously! And now Hongying can also absorb the aura of heaven and earth by herself!"

"Ah...that's pretty good!" Long Tian didn't expect Hongying to be so powerful, but she is such a powerful girl, why didn't her parents find out?

"Host, Hongying has a whole Yin physique. There is no such person in hundreds of millions, and there is no martial spirit. These people in the Tianwu Continent judge whether they can cultivate according to the martial spirit. Without the martial spirit, they are directly regarded as ordinary. Humans, you will serve others all your life like cows and horses! So let alone your parents, even those who are in the integration period of those sects, the masters at the beginning of the Mahayana period, may not be able to see that you and Hongying are cultivators!"