The mainspring drives the complex and delicate mechanical gears, and the elastic potential energy makes the gears rotate at a constant speed under the action of damping, driving the drum to rotate with it.

The teeth of the comb on the drum gently lifted the tooth comb to the reed as it turned, but the pleasant music floated out of the music box.

"What song is this?" The girl asked softly, and the prelude like a spring tinkling instantly conquered her.

"Castle in the sky." Chen Zheng said with a smile.

As a qualified watchmaker, making music boxes by hand is not a challenge. Especially for the most difficult part of making gears, Chen requisitioned the machining center on the C-type camper, and the precision gears produced were an order of magnitude higher than those made from the earth.

So what was needed to make the song Castle in the Sky wasn't technology, but patience.

This can be seen from the dense comb teeth on the sound cylinder, how much thought he has put into this music box.

Holding the sheet music in his left hand, he gently nailed the comb of the baby heel to the drum with his right hand, and finally had to go through countless adjustments to make the tone and structure tend to be perfect......

Beneath the simple wooden exterior, inside are countless delicate geared machines, and the cold and complex machinery plays beautiful music.

Maybe this is the romance of the polytechnic man?

"In that city in the sky, there is the fragrance of small wildflowers......

In that city in the sky, the birds are singing like songs......"

Chen requisitioned his incomplete voice and hummed along with the crisp syllables.

"Ahem...... It's not good to sing. Chen Zheng suddenly noticed the girl's staring at him, and couldn't help but blush, and turned his head slightly and didn't dare to look at her.

"It's good."

The girl's smile is beautiful.

……

There seems to be some tacit understanding between the two, playing chess, skiing, beer, barbecue...... Throw all the chores aside and have fun for a day and a night.

However, the reunion was short-lived.

Happy times always go by so quickly...... Despite some reluctance in both of their hearts, the moment of separation came.

"You...... I'm leaving. Before leaving, the girl seemed to have a thousand words unspoken.

Chen Zheng knew that what she wanted to ask was, "Aren't you going with me?" ”

"Goodbye." Chen Zheng lowered his head and put the sentence "Can't you stay?" "Deeply buried in my heart.

Because both of them know very well that as the "remnants" of the Blue Gold Empire, the four empires will not let them go, and the civilization behind the four empires will not let them go.

No matter where they go, if they don't have their own strength, then the future of being captured and killed is simply obvious. Even if they can evade the pursuit again and again, but people doze off sometimes, they will not be lucky forever.

Therefore, love or something is too luxurious for the two of them now.

"Take care." Chen Zheng raised his head and looked into the girl's eyes, "One day...... Hmmm......"

Soft lips, blocking what he was about to say.

“…… Be careful yourself. After the girl kissed the boy hard, she shook her long blond hair and jumped into the cockpit of BT without looking back.

“…… Good bye. Chen Zheng whispered to BT.

"Goodbye." BT-7274's voice replied, "You're such a nice person, your question made me re-examine my existence, and the meaning of life is ...... even though I haven't found it yet"

"Protect her."

"Yes." BT saluted, turned to meet the rising sun, and raised his remaining right hand.

The sun seemed to be condensed in his hands. As the light became brighter and brighter, gusts of air also erupted from the light, blowing Chen Zheng's coat to hunt.

When the light was bright to the extreme, it suddenly collapsed, turning into a deep black hole, and suddenly pulled the huge BT into it.

The wind, rolling snowflakes into the black hole.

After some time, the wind stopped, leaving only a strange circle on the ground without snow.

Chen Zheng raised his hand, smelled the residual fragrance on his fingertips, and suddenly clenched his hand into a fist.

"Four Empires...... And that high civilization...... Wait. ”

……

Half a month later.

……

"Hey, don't you think it's a little strange these days?"

The skinny monkey asked in a low voice.

"How?" The one-eyed dragon held a machine gun and patrolled carefully, looking like a great enemy, as if a monster would jump out of the forest and snow at any time.

"You didn't see that!?" The skinny monkey was surprised, "Don't say anything else in the past two days, how many times have you been beaten alone?" ”

"Hmph, that's an adult practicing martial arts skills!" The one-eyed dragon complained, "What do you mean I get beaten?" ”

"Isn't that what you are beating? The ...... who was beaten every day with a blue nose and swollen face" The skinny monkey laughed.

"Hmph, you don't even have the qualifications to be beaten." The one-eyed dragon snorted.

"Hey, hey, hey...... Who called us that...... What do you mean by that word? ”

"'Cai', which means stupid, stupid, stupid......"

"Hey, hey, hey! Adults don't say that much! Adults just say it's stupid! ”

"Serious patrols! Don't forget the tasks assigned by adults! The one-eyed dragon angrily stopped the conversation.

The two were patrolling along the perimeter of the monitor.

In half a month, all the refugees have moved back from the outpost camp. As rows of wooden huts were erected, many jobs were filled by selected personnel from among the refugees.

For example, the work of monitoring the captured soldiers was entrusted to the agents under Lao Wang, who were professional in this regard. The freed man with glasses and his men drove snowmobiles and carried newly built equipment to explore the surrounding mineral conditions.

Some of the security work of maintaining law and order was also slowly handed over to the foreign agents who took the initiative to assimilate.

With the translator of black technology, communication between various races is no longer a problem. However, due to the limited number of translators and the fact that they cannot be manufactured for the time being, so until now, only "public officials" have been able to provide them in place.

Chen Zheng, on the other hand, lived in seclusion during this time, rarely appearing in front of people, and only occasionally called the one-eyed dragon and Scar, who were strong in martial arts, to spar with him.

Since other people have taken over the professional things, Chen Zheng finally has time to explore the secrets in the pendant.

However, just as everything was on track, a man suddenly disappeared from the thriving camp.

The missing person was a Malay man who had been one of Blackskin's men.

Due to Chen Zheng's conspiracy, Heipi and his men soon became street rats that everyone shouted at. After the black skins were sent to the mines, the discriminatory treatment of the Malays naturally disappeared.

However, those who have been under the hands of the black skin are still not welcomed.

Just when people thought he had escaped on his own, Chen Zheng, who checked the surveillance records around the camp, found that the matter was far from a case of disappearance.