They firmly believe that as long as they explore the unknown areas in the darkness, they will be able to find light and answers.

By chance, they discovered an ancient relic hidden in the mountains.

This relic seems to have some mysterious connection with alien civilization.

Zhang Yu and his team decided to explore the ruins in depth.

They hope to find clues about the source of the virus and alien technology here.

However, the situation in the ruins was far more complicated than they had imagined.

This place is full of unknowns and dangers, and every step may trigger a trap or encounter an attack.

In the ruins, Zhang Yu and his team experienced a series of thrilling adventures.

Not only do they have to face the traps and monster attacks in the ruins, but they also have to deal with creatures and guardians that have been enhanced by alien technology.

However, they never backed down. They firmly believed that as long as there was light in their hearts, they would be able to overcome all difficulties.

After arduous efforts and exploration, they finally found the truth about the source of the virus and alien technology.

It turns out that the virus was accidentally released by alien creatures during an experiment.

They originally intended to use this virus to destroy the organisms on Earth and occupy the Earth.

However, for some reason, this plan was not successfully implemented.

The ancient civilization in the ruins once had contact and communication with alien civilizations.

They possessed some secret knowledge about alien technology and viruses, and recorded it in murals and documents in the ruins.

By interpreting these murals and documents, Zhang Yu and his team finally found ways to treat the virus and strategies to curb its spread.

As treatments were discovered and treatments were carried out, the virus was gradually brought under control and eventually eliminated.

The earth once again welcomed light and hope.

Those who were once infected with the virus have gradually recovered their health and vitality.

Zhang Yu and his team became the heroes and saviors of the new era.

However, Zhang Yu's work is not really over...

Zhang Yu and his team continued to walk deeper and deeper into the ruins, as if every step they took was stepping on the dust of history.

The air inside the ruins became extremely heavy, a mixture of ancient and unknown breaths, making people feel suffocated.

"Everyone be careful, the mechanisms here may be more complicated." Zhang Yu warned in a low voice, his eyes looking particularly sharp under the dim light.

Suddenly, there was a slight vibration from the ground, and then a stone door hidden in the wall slowly opened, revealing a dark entrance.

"This is..." archaeologist Xiao Li, one of the team members, shouted in surprise.

"It looks like a passage leading to the next level." Zhang Yu analyzed calmly. He signaled everyone to stay alert and slowly walked towards the stone door.

The moment they stepped through the stone gate, the surrounding scene changed instantly.

The originally dim interior of the ruins suddenly became bright, and countless colorful lights flickered on the walls, as if entering a fantasy world.

"This... is this a product of alien technology?" Team member Xiao Wang widened his eyes and looked at the surrounding scene in disbelief.

Zhang Yu nodded, took a deep breath, and felt the strange energy in the air.

He knew that they were getting closer and closer to the truth.

They continued along the passage, encountering many amazing sights along the way.

There is a huge stone tablet suspended in the air, engraved with alien characters.

There are strange plants that are shining with light and seem to possess some mysterious power.

There are also creatures that have been enhanced by alien technology. They lurk quietly in the darkness, waiting for their prey to arrive.

Every encounter made them terrified, but Zhang Yu and his team never gave up.

They firmly believe that as long as there is light in their hearts, they will be able to overcome all difficulties.

Finally, they came to a huge hall.

In the center of the hall stands a huge altar, on which is placed a sparkling crystal ball.

"Is this what we are looking for?" Xiao Li asked nervously.

Zhang Yu nodded, he slowly walked towards the altar and stared at the crystal ball.

He could feel the powerful energy contained in the crystal ball, a power he had never seen before.

"Is this the secret of the source of the virus?" Zhang Yu asked in a low voice.

Suddenly, the crystal ball began to flicker violently, and a powerful energy burst out from it.

Zhang Yu and his team were shocked by the energy and retreated again and again. They looked at everything happening in front of them in horror.

At this moment, a deep and majestic voice echoed in the hall: "Mortal, how dare you disturb my sleep!"

Zhang Yu and his team looked at each other in surprise. They knew that they had finally touched the deepest secrets of the ruins.

The low and majestic voice echoed in the hall for a long time before gradually subsiding.

Zhang Yu and his team stared at the crystal ball on the altar nervously, fearing that any more accidents might happen.

"We...we don't mean to disturb you." Zhang Yu mustered up his courage and answered carefully.

However, the voice did not sound again.

The light in the crystal ball gradually became softer, as if everything had returned to calm.

Zhang Yu and his team looked at each other and decided to continue exploring.

They walked cautiously toward the altar, trying to get closer to the crystal ball.

When they finally stood in front of the altar, pictures suddenly emerged in the crystal ball.

Those images seem to be historical records of alien civilizations, showing their contact and communication with Earth civilization.

Zhang Yu and his team were stunned. They couldn't imagine that they could actually witness such history with their own eyes.

In the picture, alien creatures are having friendly exchanges with humans on Earth and exploring the mysteries of the universe together.

However, as time goes on, the atmosphere in the picture becomes more and more tense.

The alien creatures began to show greed and desire for the earth. They planned to use a virus to destroy the organisms on the earth and occupy the earth.

Zhang Yu and his team were shocked. They realized that this was the truth about the source of the virus.

They nervously watched the developments unfold, hoping to find a cure for the virus and a strategy to curb its spread.

In the picture, when the alien creatures' plan is about to be implemented, an ancient civilization on Earth suddenly appears.

This civilization once had contact and communication with extraterrestrial civilizations, and they mastered some secret knowledge about alien technology and viruses.

At the critical moment, this ancient civilization stepped forward and used its knowledge and power to stop the alien creatures' plan.

They recorded methods of treating the virus and strategies to curb its spread in murals and documents, hidden deep within the ruins.

Zhang Yu and his team were very excited because they finally found the key to treating the virus.

They looked at each other excitedly, as if they saw the dawn of victory.

However, at this moment, the picture in the crystal ball suddenly stopped.

That deep and majestic voice sounded again: "Mortals, you already know the truth.

Now you must take responsibility for protecting the Earth."

Zhang Yu and his team were shocked. They knew that this was the instruction and expectation of the alien civilization for them.

They nodded silently and firmly stated that they would take on the responsibility.

After leaving the altar, Zhang Yu and his team began to carefully study the murals and documents in the ruins.

They knew that these murals and documents contained key information for treating the virus.

The murals depict the exchanges and conflicts between alien creatures and the ancient civilizations of the Earth.

Those strange symbols and patterns seem to be telling a long lost history.

Zhang Yu and his team observed the murals and recorded the key information.

They used their expertise and experience to try to decipher the secrets of these murals.

After several days of hard work, they finally made some progress.

They discovered that there was an ancient script hidden in the murals, which was somewhat similar to the script used by alien creatures.

"It seems we have to find a way to decipher this text." Zhang Yu frowned. He knew it was a difficult task.

However, just when they were in trouble, an unexpected discovery gave them hope.

In a corner of the ruins, they found an ancient document.

The document appears to be written in a language similar to that in the murals.

Zhang Yu and his team were overjoyed and began to study the document immediately.

After careful comparison and analysis, they finally found a way to decipher the text on the murals.

As they interpreted the murals, they gradually uncovered the truth about how to cure the virus.

It turns out that the key to curing the virus lies in a rare plant that only grows on planets where alien life has once been stationed.

"It seems we have to find this plant." Zhang Yu took a deep breath. He knew that this was a difficult and dangerous task.

However, his team members did not back down.

They all expressed their willingness to follow Zhang Yu to the planet of alien creatures to search for this plant.

Under the leadership of Zhang Yu, they began to prepare to set off.

They collected all possible useful information and resources from the ruins and developed a detailed plan and route.

Finally, on a dark and windy night, they set out on their journey to the alien planet.

Their hearts were filled with tension and anticipation, but also with hope and courage.

Interstellar travel is an unprecedented challenge for Zhang Yu and his team.

Not only do they have to face the vastness and unknown of the universe, but they also have to deal with the dangers and difficulties they may encounter.

They began their long interstellar journey on an interstellar spaceship that was transformed from an ancient spaceship found in the ruins.

The interior of the spacecraft is full of traces of alien technology, and the various complex instruments and buttons are dazzling.

While learning how to operate the spacecraft, Zhang Yu and his team carefully observed the surrounding starry sky.

They knew that this was a journey full of unknowns and dangers, and they had to remain vigilant at all times.

During the voyage of the spacecraft, they encountered many amazing sights.

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