Since then, the areas within the space were called Ancient Earth. Although the human factions left on Earth did not touch the power of Ancient Earth, they maintained contact with the tribes of Ancient Earth. The tribes informed them that as long as their power reached a divine level, they could open space rifts and reunite with the tribes inside Ancient Earth.

So the human factions on Earth began a frantic cultivation. But suddenly one day, they lost contact with the tribes inside Ancient Earth. They only vaguely received distress signals from companions within the space. However, they couldn't reach or rescue them, leaving them helplessly anxious.

Waiting seemed to be the only thing they could do at the time. No one knew how long passed, and the distress signals gradually faded. The Ancient Earth people responsible for contacting the human factions almost begged them to seal off the entrance to Ancient Earth and guard it until a human capable of reaching the peak realm appeared to reopen it. After that, no news was heard.

The human factions on Earth were bewildered but strictly followed the elder's words. They erected a massive Copper Gate at the entrance to Ancient Earth. At that time, there were seven tribes among Earth's human factions, so the leader handed the seven secret codes for opening the Copper Gate to people from these seven tribes, and left the most powerful tribe at the time to guard the Copper Gate for generations, while the other six tribes dispersed to seek power until they could reopen the Bronze Gate.

Ci Xin's ancestors were the tribe that guarded the Bronze Gate for generations. The parchment in Xiao Yifei's hands marked the locations of the secret codes held by the other six tribes besides Ci Xin's tribe!

Xiao Yifei was stunned, looking at Ci Xin's calm face, unable to speak due to his shock. The sensational story echoed in his mind, difficult to calm.

"So humans had such an encounter. No wonder you wanted me to help with acupuncture, aiming to go into the Bronze Gate," Xiao Yifei finally understood why Ci Xin was persistently seeking his help.

"No, your Xiao Family was also one of the seven surviving tribes at the time. The acupuncture technique secretly passed down in your family was the method from that era to help humans gain power," Ci Xin looked at Xiao Yifei and spoke gently.

"This," Xiao Yifei was even more astonished. It turned out his lineage also came from ancient times. Although not as strong as Ci Xin's tribe, it was still "Kai Guo Yuan Xun."

Ci Xin continued: "Our two tribes signed a contract at the time. The descendants of the Xiao Family must help our Ci Family improve cultivation and break through the Bronze Gate's barrier as soon as possible. Only then can we find out what really happened inside Ancient Earth."

Xiao Yifei suddenly realized.

No wonder his grandfather said those words to him before passing away. His grandfather wanted to tell him this secret, but with the current technological advancements, was worried he'd be seen as a lunatic.

Grandfather wanted to bury the "Xiao Shi's Zero Eight Needles" with him, protecting Xiao Yifei's safety. Though he felt guilty towards Ci Xin's tribe, it was undeniably a well-intentioned choice.

Xiao Yifei couldn't help sighing, "Grandfather, I've been unfilial!"

Ci Xin looked at the thoughtful Xiao Yifei and said, "Now, I've broken through this barrier. As long as I find the secret codes left by the seven families, I can open the Bronze Gate and go to Ancient Earth."

Xiao Yifei was silent.

Ci Xin raised her jade hand to her face, intentionally posing with graceful eyebrows, and smiled at Xiao Yifei, "I wonder if you have any interest in coming along, sir?"

Xiao Yifei laughed dumbly, knowing that Ci Xin was trying to ease the awkward atmosphere, but given the volume of information Ci Xin provided earlier, he was still digesting it.

Although he bore a heavy responsibility, he felt hardly any sense of mission passed down from ancient times. His Xiao Family or, perhaps his grandfather, had opposed him learning medical skills from childhood. Yet, his skills were just a mere trifle learned abroad.

Moreover, Huaxia now faces internal and external challenges. He couldn't set aside concerns for the two Hua Family girls. The sudden emergence of Ancient Earth genuinely threw him into confusion.

Ci Xin seemed to have guessed Xiao Yifei's thoughts. She sighed softly and said, "If you help me gather the secret codes, I won't treat you unfairly. I know you worry about your homeland and friends. Once I'm back from the Bronze Gate, I'll certainly assist you in eliminating evil and restoring peace to Huaxia."

Xiao Yifei looked back at the Bronze Gate in front of him, feeling inexplicably conflicted.

It's really the whims of fate. Just when he started excelling in medical skills, he felt his strength was insufficient. Though good at healing, he couldn't protect others. Just when he decided to diligently cultivate, starting to touch the path of cultivation, Ci Xin came along, entrusting him with such a significant responsibility.

Moreover, his strength was far inferior to Ci Xin's. How could he enter the Ten Thousand Mountains to find the remaining five secret codes for her?

"I will surely help you cultivate," Ci Xin again seemed to predict Xiao Yifei's thoughts.

"How come you know everything I'm thinking?" Xiao Yifei asked in surprise.

Ci Xin laughed and replied, "After breaking through to the Golden Elixir Realm, I became skilled at reading common people's thoughts, as if hearing the voice of your heart."

"Voice of the heart?"

"Exactly." Ru Xin answered.

"After breaking through this realm, the sense becomes more acute. The five senses become extraordinarily keen. Everything around feels enveloped by Qi. I can predict someone's actions through the movement and flow of Qi, and hear someone's thoughts through enhanced hearing."

This was the first time Xiao Yifei heard Ci Xin talk about the changes after her breakthrough. As someone who had just begun to understand cultivation, naturally excited, he insisted Ci Xin continue talking about the traits she had perceived in this stage.

Ci Xin couldn't refuse him and continued, "Cultivators focus on Qi. Those below the Golden Elixir Realm cultivate to make their bodies and surrounding Qi more cohesive, thereby enhancing their strength. Hence, the Golden Elixir and below realms allow cultivators to increase cultivation through absorbing Qi from heaven and earth. When Qi accumulates to a certain level, the Dantian becomes saturated, and the Qi filling the Dantian starts to condense gradually, forming an inner core as cultivation progresses."

Xiao Yifei, coming from a medical background, was well aware of the body's structure. With a little perception, he noticed changes in his Dantian.

Indeed, the Inner Energy in his Dantian was circulating slowly. With a slight extraction, his body's pores immediately drew the corresponding amount from surroundings to refill the Dantian.

However, when he intended to use all the Qi in his Dantian, his strength surged instantly, affecting the surroundings, causing disturbances of flying rocks and sand.

Yet this feeling only lasted for a moment. His body began feeling weak and powerless. Xiao Yifei carefully sensed and found out that the Qi in his Dantian had been emptied, and without timely replenishment, his body showed signs of overload.

Ci Xin glanced and said, "Once breaking through to the Golden Elixir Realm, forming an inner core, the quantity of Qi changes qualitatively, revealing Qi's types. Currently, my Qi is divided into two types: sensory Qi and body energy."

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