Tropical rainforests of Southeast Asia.

A tropical brown squirrel crouches in a damp tree, holding a ripe acorn between its front paws.

Its cunning little eyes ensure the safety of the surroundings.

The snake was lazily coiling around a neighboring tree, not even bothering to eat the skinny squirrel.

The blue Peruvian poison dart frog at the foot of the tree, although interested in the squirrel, jumped around the tree trunk for a long time and failed to climb up.

The brown squirrel can now rest easy.

The acorn was spun around by its nimble front paws. Its two fast teeth appeared gleamingly as it began to chew the acorn with a rustling sound.

Very comfortable.

At this moment, the sky roared and the air vibrated violently.

A disc-shaped aircraft, with a blazing silver light, broke through the sky and arrived in an instant.

The anti-gravity engine caused the jungle hundreds of meters below to sway like ocean waves.

Air currents arose and all kinds of animals fled in panic.

Boo.

The brown squirrel was startled and the acorn in its hand was squeezed out by itself, hitting the Peruvian poison dart frog on the head, causing it to fly upside down.

The squirrel also ran away in panic.

And above the silver shuttle.

Brother Liu looked down at his feet.

The old man's laboratory is actually hidden in a place like this?

After choosing a relatively flat terrain, the silver shuttle slowly landed.

The hatch opened, forming a slope of steps, and a man in a white shirt slowly walked out.

Behind him, Porrin followed him, jumping and skipping. The little girl was very happy because she was going home.

Brother Liu looked around.

This is deep in the rainforest. There is no human life, the natural ecology is very intact, and it is a pristine landscape.

Raise your head slightly.

Brother Liu smiled slowly.

Even though this place is deserted, there is still a twin signal tower standing on the high ground in the distance.

There was no twin sky domes above, but the towering black tower still continued the dark matter network, and carried the Sky Eye system, and micron worms were also stored inside.

The molecular future is everywhere.

But Liu Di had to admit that the earth was too vast to be completely covered by human power in a short period of time.

There is only one twin signal tower in this rainforest.

So there is very little information.

For example, I didn't know that Jiang Lao's laboratory was also located in this rainforest! Or...

Mr. Jiang’s technology is superior to his own, and no matter how advanced the equipment is, it will not be discovered.

"The long river of time in the future still lacks many details and needs to be slowly constructed."

"I must also be in awe of this world."

Brother Liu sighed.

I was looking forward to what kind of technology is hidden in Jiang Lao's laboratory, and whether it can help me on my path to upgrading. But I saw that Bo Lin had already run forward.

She walked around a bush, ran behind a big tree, and stretched out her little hands to pull apart the banana leaves.

"Brother Liu, come quickly!"

She stood on tiptoe and called out.

Brother Liu took a few steps forward and was slightly startled. He saw a door embedded in the huge rock in front of him. It was made of ordinary alloy steel and was covered with rust. There was a round handle on the top, which looked like the door of a ship.

This is different from what Liu Di imagined.

Feeling a bit behind.

Brother Liu asked, "How long has it been since Mr. Jiang came?"

"His quantum body is too massive, and he hasn't returned to Earth in many years!"

Po Lin said, stretching out his slender little hand and holding the door handle, "Look at me, hey! Hey!"

Creak.

An obscure and harsh sound was heard. The door handle must have been rusted for a long time, and it was impossible for a normal person to open it with bare hands.

But standing in front of it was a violent loli.

Po Lin turned the handle twice easily, then suddenly realized something and pouted, "Oh, I can't turn it. Brother Liu, can you hold my hand and let's turn it together?"

Brother Liu didn't think much about it and did as he was told.

Bo Lin looked like he had succeeded. He hid under Liu Di's arm and giggled secretly, his little face turning red.

The iron door burst open.

Brother Liu tilted his head to take a look. The area was dark and deep, and the path seemed very long.

As the two of them walked in, Po Lin did not forget to turn back and close the iron gate. This time, she twisted it with one hand at an extremely fast speed.

The tunnel in front of us was simply dug out of the soil, with earthen rock walls on both sides. The roots of many plants have penetrated through and are intertwined.

What illuminates the tunnel are the glowing crystals scattered in the soil.

There is no mistake in the poem, post, content, and read the book on 6, 9, and bar!

At first glance, it looks very much like an old-fashioned mine tunnel.

The further you go in, the narrower the tunnel becomes, creating a sense of urgency, but even the narrowest spot is wide enough for an adult to stand and pass through.

Liu Di could clearly feel the inclination of the tunnel, which was extending underground.

It took more than ten minutes to walk.

Liu Di couldn't help but feel a little suspicious.

According to the technology of this tunnel, to be precise, there is no real technology involved, it seems like a product of the farming era.

Could this old man’s laboratory have been left behind N years ago?

Among them are tungsten filament light bulbs, steam engines, etc.?

finally.

The two walked to the end of the tunnel.

This is a wooden door with a brass lock above the wooden bolt. About 20 centimeters away from the lock, there is a key hanging on the hammer. There is also a chalk circle around it and an arrow with the words "Here is the key" written at the end of the arrow.

Liu Di nodded in approval, "What a tight defense mechanism."

Po Lin pouted and said, "I can't return to Earth, but Po Lin comes back often. I always can't find the key, so I made a note!"

Brother Liu nodded again, "I don't have to worry about you not being able to find your keys anymore."

The wooden door was opened by Porrin.

The interior finally opened up, revealing a long corridor 3 meters high and 5 meters wide. An independent power supply was connected, and dim lights were on.

Liu Di pursed his lips and said, "It is indeed a tungsten filament bulb."

Walk slowly in it.

Brother Liu saw rows of anti-oxidation photo frames hanging at both ends of the corridor.

They are basically group photos.

'Unity College Graduation Ceremony'

'Quantum Club Mid-Autumn Festival Group Photo'

'Teachers' Day 1987 Group Photo'

Liu Di's vision slowly focused. Many of the photos had a sense of age, and some were even in black and white.

Among them are a group of youthful students surrounding their mentor.

This tutor was about 40 years old, wearing a white coat and had a bright smile.

"Yes, old man."

"I remember him saying that he was actually a PhD in quantum physics."

Brother Liu's eyes flickered.

Bo Lin said: "Jiang Lao has been teaching and educating people since he was 23 years old, for a full 40 years! He has trained nearly 20,000 students. He is very popular!"

Brother Liu was filled with awe.

Walking slowly, Liu Di's eyes swept across the old photos.

His expression became more and more surprised.

He saw two familiar faces.

Willow pattern.

Liu Zhengqing.