Hangu Pass, located in the west of the plateau, facing Juejian to the east, Qinling to the south, and Yellow River to the north, is one of the most famous passes in ancient China.

Because the pass is in the valley and is as deep as a dangerous place, it is called Hangu Pass.

Due to its important geographical location, it has always been a must-fight place for military strategists after the establishment of the Pass. I don’t know how many times the killing horses neighed and corpses were everywhere.

In the past, the coalition of the Kanto princes failed to attack Qin, and the Qin army had strong combat power, and Hangu Pass also made an indelible contribution.

It was getting late and there were even fewer people in the valley.

On the city tower, soldiers are changing their guards.

It was already winter, and it was very cold, and the soldiers were all hunching their necks.

Suddenly, a strong wind with endless chill passed by.

"Hiss! Where does the wind come from?"

“So cold?”

...

A trembling voice rang out.

A moment later, two misty figures fell from the air in the valley.

It’s not someone else, it’s Cao Yi, who came from the Red Cliff, and the immortal Nanhua.

The Nanhua Immortal walked to a clearing field with sparse weeds, and his hands continued to change, making nearly a hundred complicated seals.

This space trembled slightly, as if it was about to break open.

Soon, a portal emitting purple light appeared out of thin air.

"Get in"

The Nanhua Immortal walked in first.

Cao Yi followed him in without hesitation.

What caught my eye was a black pass like a giant beast, ten feet high, and there were many signs of swords slashing and burning on the city walls and gates.

The ground is not good either, with potholes, and discarded broken weapons that have lost their divine nature, white remains of wild beasts or humans, like an ancient battlefield, more like a place for monks to practice.

"Be careful to follow the old man"

The immortal Nanhua left a word and walked in.

Cao Yi followed behind.

After a while, Cao Yi understood why the immortal Nanhua had to be careful to follow him.

There is a completely dead land inside Hangu Pass. Except for an ancient road that was obviously forcibly opened up by someone, other places contain murderous intent. Not to mention passing, if you look at it for a while, you will feel a stinging feeling.

Sometimes, you can also hear the roar of people or beasts.

"According to legend, the ancient Qi training genius fought with the evil demons outside the territory. Although the ancient Qi training genius successfully defended the place, it also paid a terrible price.

The blood stained the land red, and the power of the law on its body remained undispersed, intertwined here, forming a terrible dead domain."

The Nanhua Immortal explained.

"I see"

Cao Yi nodded.

Half an hour later, the two walked out of the city and passed by a huge altar.

The altar is in five colors, with endless five elements flowing on it.

"This is the entrance to the secret realm, but unfortunately it will take three hundred years to enter."

The immortal Nanhua said.

This is the entrance to the secret realm.

Cao Yi took a look and contacted the system in his heart: "The treasure box of time and space, traveling through time and space."

"Time, place?"

"Two hundred years ago, in place"

"Walk"

The immortal Nanhua withdrew his gaze and walked forward.

After walking less than five steps, I felt a strong suction force behind me, turned around suddenly, and then a look of surprise appeared on my indifferent face.

A portal that was one meter high and four feet wide appeared on the five-color altar, and the power of the five elements flowed on it.

"Senior? Is the secret realm open?"

Cao Yi pretended to be unaware of all this.

"Why did it open?"

The Nanhua Immortal was confused by this sudden change.

Cao Yi didn't say anything.

After a few breaths, the immortal Nanhua came to his senses, pressed his hand on Cao Yi's shoulder, and flashed into the portal.

"this?"

As soon as he came in, Cao Yi saw something beyond expectations.

The so-called secret realm is like a universe that has been reduced countless times.

Stars as big as fists and as big as rice grains float in the air.

Golden lines connect these stars, like a route.

The immortal Nanhua sat cross-legged and said, "I have obtained part of the inheritance of the ancient Qi training scholars here."

Seeing this, Cao Yi sat down.

Half an hour, one hour.

No response at all.

Cao Yi simply used the method of returning the golden liquid to the alchemy to absorb the aura of the grass and trees in the king of ginseng.

When the body was surrounded by green grass and green grass, a faint voice appeared in my mind, as if talking about the five elements.

"Is it related to the spiritual energy of plants and trees?"

Cao Yi continued to activate the spiritual energy of the plants and trees in his body.

The faint sound became clear.

It is not about the five elements, but about two sutras, one is called the "Taiyin Sutra" and the other is called the "Sun Sutra".

One is to absorb the holy power of Taiyin, that is, the power of the moonlight, and the other is to absorb the true fire of the sun.

One is from the direction of extreme yin and the other is from the direction of extreme yang, explaining the five elements and the way of yin and yang, which is very obscure.

One day, two days...ten days... fifteen days passed.

"Little friend"

The voice of the immortal Nanhua sounded.

Cao Yi opened his eyes and saw the immortal Nanhua coming in from outside. His face was a little solemn.

"Senior, why is this?"

"I just went out and learned that Wang Mang had just usurped the Han Dynasty."

The Nanhua immortal frowned slightly.

Wang Mang usurped the Han Dynasty? Cao quickly reacted.

From 208 AD to 200 years, isn’t it just that Wang Mang usurped the Han Dynasty?

The great magician Liu Xiu is still a teenager this time and should still be farming in his hometown.

"Why did it go back two hundred years ago?"

The immortals in Nanhua were puzzled.

"Ding! The power of the space-time treasure box is about to be exhausted. If the host does not leave, he will stay here forever. Should he leave?"

That's all!

"leave"

Cao Yi immediately said in his heart.

A powerful suction force appeared out of thin air, as if it was about to suck everything away...

Cao Yi immediately felt a strong pulling feeling, which was very uncomfortable.

"Um"

The eyes of the immortal Nanhua flashed.
To be continued...