Zheng Xuan was tossing when the doorbell suddenly rang.

"Who?" Zheng Xuan was a little curious, who would come to him at this time if he didn't know someone here?

Opening the door, Zheng Xuan looked outside, and no one !!???

"Jingle Bell Jingle ......"

A soft, melodious sound of cue music came from under his feet.

Zheng Xuan looked down and saw that a small anthropomorphic robot was standing in front of his feet.

"Hello guest, I am a cleaning robot at this level, number 89757, nicknamed Black Cat No. 4, do you have any services after you move in?"

"Yes! Yes! Yes! You come in! Zheng Xuan suddenly had a weird smile on his face.

"Drip ...... Guest asked to enter the room, confirmed? ”

"Confirm!"

This kind of robot is not actually intelligent, but grabs the key words in the other party's language to trigger the corresponding behavior, so sometimes it needs to be confirmed by humans.

"Black Cat No. 4" drove the small wheels under his feet and slowly drove into the room, stopping at the place designated by Zheng Xuan just now.

"Drop, please ask the guest for the next step!"

"Wait!" Zheng Xuan dragged the large suitcase that he had just thrown near the door to the open space in the center of the room, then rummaged through it, and finally took out a "leather" rolled up in a ball.

He laughed weirdly and said, "Little Xuanzi's toolbox, unfold!" While manually opening the roll of "leather".

Su Guo looked at Zheng Xuan'er as if he had to narrate his movements, and looked at the roll of leather.

He discovered that the roll of leather was indeed a "toolbox" filled with tools he didn't recognize, and the same style came in several sizes, from large to small.

Zheng Xuan picked out a medium-sized thing that looked like a screwdriver from it, and then circled around the "Black Cat Four" a few times.

When he turned to the back of Black Cat Four again, he suddenly rushed up and took down the robot, then flipped a switch on the chassis.

"Hiss......"

Su Guo was taken aback by Zheng Xuan's obviously ill-intentioned move, and instinctively blew up the hair on his whole body and jumped up in place.

Before he could think about how to resist Zheng Xuan's "atrocity" next, Zheng Xuan had already straightened up and said with a smile to the robot on the ground that had turned off the main switch...... You can't resist now, can you? ”

After saying this, he dragged the robot to the open space in the middle, and the "screwdriver" in his hand turned around between his fingers, and then began to disassemble the robot's chassis.

Emma...... It's scary......

Su Guo's little heart was pounding now, because Zheng Xuan had always had a weird smile on his face, and strange eyes flashed in his eyes from time to time, as if he had seen Frankenstein before......

Su Guo secretly shrunk his body into a corner, trying to minimize his sense of existence.

Anyway, Zheng Xuan seemed to be very kind to himself just now, did he have bad intentions for himself? Do you want to drag yourself to some research room to dissect?

Just when Zheng Xuan was busy with a serious face and devoted himself, and Su Guo was inexplicably thinking wildly, neither of them paid attention, and a dark red light flashed on the display screen on the robot's head and eyes.

Zheng Xuan used a screwdriver to unload the chassis of the robot into eight pieces, pulled out a line from it, and then took out a small tool from the "toolbox", connected it to this line, and operated on the personal terminal for a while, then took down the small tool and began to assemble the chassis.

It seems that the assembly is much simpler than the disassembly just now, and Zheng Xuan even has time to do things while humming a small tune.

After installing the chassis of the robot as it was, Zheng Xuan inserted the screwdriver back into the "toolbox", clapped his hands, and sighed to himself, "Perfect!" ”

Just as he bent down and was about to turn on the main switch of the robot, he heard an angry roar from his personal terminal: "Xiao Xuan! What are you doing! ”

"Plop!" The defenseless Zheng Xuan was frightened and fell into a ball with the robot.

"Dad! Why are you scary! Zheng Xuan got up from the robot in embarrassment, "I...... Not...... Didn't do anything! ”

"You! ......" Before Zheng Xuan and his father could roar again, the door of the room was opened.

Su Mingxuan stood at the door of the room, "Sorry to disturb me!" I am the owner of this inn. ”

"Huh?" Zheng Xuan was still wondering why Su Mingxuan appeared.

He didn't know that the cleaning robot of the Black Cat Hotel, because it served in public, was connected to the police system, and when he put the robot down and dismantled the chassis just now, he had already touched this system.

The system immediately automatically linked to Su Mingxuan's terminal, and it was up to him to judge whether to further trigger the alarm.

Su Mingxuan received the alarm, and while running back in a hurry, he connected to the hotel's remote monitoring, only to find out that it was the "minor" reported by Xiao Dong who was dismantling the robot, so he stopped the alarm, and notified Zheng Xuan's father instead.

As soon as Father Zheng heard about this, he almost burst into anger, and his son, who swore to himself before, "You can rest assured", got into trouble after a while, and almost alarmed the police.

So, it was forced to link to Zheng Xuan's terminal.

As a guardian, he can forcibly link and control the terminal of the guardian at any time as needed, and this provision is also for the personal safety of minors. However, Daddy Zheng has always respected his son's privacy and has confidence in his son's IQ and ability, so he rarely uses this function.

Unexpectedly, the son who had just been released alone in front of him caused trouble after a while.

"Boss Su, I'm sorry!" Father Zheng saw Su Mingxuan coming in from the terminal, and he didn't care about teaching his stinky boy a lesson for the time being, but greeted Su Mingxuan first.

"It's fine!" Su Mingxuan glanced at his orange cat out of the corner of his eye, the guy was squatting on the shoe cabinet unharmed, staring around with curious eyes, it didn't look like he was being bullied.

"Anyway, Zheng also installed the robot as it is!" Su Mingxuan thought that Zheng Xuan was just curious to take apart the robot to take a look, plus his own cat was fine, so he didn't mind very much, at most he would go back and send the "Black Cat No. 4" for maintenance!

"Hehe~ This kid is so clever!"

"Who said that?!! It's not as it is, right!! ”

The voices of the Zheng family's father and son sounded together.

Su Mingxuan: "......??? ”

"And you broke the robot?" Daddy Zheng's voice became serious, he wasn't afraid of losing money, he just felt a little embarrassed, this was dismantled and installed, it was called level, and it was broken...... That's called trick-or-treating!

"Where!" Zheng Xuan's voice was full of grievances! "I researched some time ago, there is a bug in the main control program of this model of the robot, which will reduce the work efficiency of some aspects of the robot, and then I wrote a small program to fix this bug! That's what I just installed this program! Now this number four is definitely much faster than the other numbers! ”

Su Mingxuan: The idea of "............ It's a bit hard to keep up......

Daddy Zheng is worthy of being a person who is used to doing big business, and immediately reacted to what his son did, "That means that you have optimized this model of robot?" ”

"A little bit...... A little bit ......" Zheng Xuan's tone carried a hint of modesty, but his face was full of "Praise me!" Praise me! ”

"Then you can't buy one yourself and come back to try it, what are you doing in Boss Su's store?" Father Zheng was puzzled again, this kind of robot is not expensive, and his son's pocket money should be affordable.

"It's not ...... Just finished writing it the other day...... I didn't have time to buy it before I came to Hujiang. When I saw that the black cat No. 4 happened to be this model just now, I couldn't hold back it for a while, my hands were itchy......