With the lesson learned from the last time, Zhang Yang used canvas coated with anti-crack glue when making new works. Some unreasonable collocations were dismantled, and a "chair" was made out of aluminum alloy. On the armrest of the "chair", various operation function keys are pressed. And press the blades of the wind wheel on the back of the "chair...... Yang Ling'er watched from the side, and finally she made a suggestion: make the "chair" seat longer, so that it can seat two people, and you can also put some daily necessities and other things on it.

Zhang Yanglian said that this is a good idea. The length of the original 60 cm was improved to 90 cm, and the width of 50 cm remained unchanged.

Because of Yang Ling'er's accompaniment, Zhang Yang felt quite fulfilled when he went up the mountain this time.

In order not to alarm the people in the village, they dismantled the flying chair and carried it in a bag, and walked all the way, but the two of them didn't say much, and arrived at the foot of the main peak at the top of the mountain.

Yang Ling'er said that climbing the mountain was really a little tiring, so she found a smooth mountain rock to sit down and rest.

Zhang Yang smiled and said I can't be idle. Open the bag, take out the various parts of the flight chair, and assemble them piece by piece. It didn't take long to assemble it.

beckoned Yang Ling'er to get on the chair, and the flight chair carried the two of them to Hole D.

After a while, the flight chair slowly landed on the platform protruding from the entrance of the D hole within the controlled range.

After getting off the chair and bringing three new works for temporary standby, Zhang Yang led Yang Ling'er all the way into the cave cautiously.

The deeper it goes, the dim light seems, and in the end you can't see your fingers.

I turned on the bright light, but I saw that the cave was full of strange rocks, and a few unnamed birds fluttered their wings.

"Zhang Yang, isn't this your school bag, why is it here?" Yang Ling'er said, pointing to a backpack on the ground in front of her.

The reason why she recognized this as Zhang Yang's schoolbag at a glance was because this schoolbag was given by her.

"Finally found it, strange, how did it appear here?"

Zhang Yang seemed very happy and ran forward to pick up the schoolbag, this bag is very precious to him, and he has been haunted by it since he lost it last time.

So he described the process of his last loss, but he didn't say a word about how he almost fell off the cliff, because he didn't want Yang Ling'er to worry about him.

But Yang Ling'er heard the crisis in the process, but she didn't say anything, but reminded her to be careful in the future.

Zhang Yang nodded seriously.

After circling around the cave, the two of them returned to the original position of departure in about twenty minutes.

Yang Ling'er was surprised: "How did you go back to the original way!" "The shape of this cave is like a capital 'D' in English, and we walked around the edge, so we went back to the original way!"

Zhang Yang smiled and said that this is the result of our carelessness.

"Do you remember the exact location of the mechanical bird's impact?"

"No problem. Zhang Yang turned on the detector, searched around the stone wall, and stopped in front of a stone wall.

"This is it. "After careful observation for a while, I didn't find the slightest sign of anything unusual. I couldn't help but be surprised, "It's really strange, how can this be!"

"Is there any other way to find out?" Yang Ling'er looked unwilling.

"Try it with a powerful blaster. ”

"Ahh

"Don't be nervous. Zhang Yang analyzed, "This miniature blasting canister is the last time I made it public at school, this is my temporary production, its function is to rotate, only blast to the depth of the fixed position, will not affect any surrounding substance." It is similar to the down-the-hole drilling rig of rock drilling equipment, but the speed is several times more efficient. "Reaching into his pocket, he pulled out something the size of a tiny flashlight. "That's it. ”

As he spoke, he aimed the blaster at the spot where the strange bird had struck. With a thud, the blaster burrowed into the stone wall in an instant, and the smoke filled only the flashlight-sized hole.

After about two minutes, the blaster stopped. Illuminated with strong lights, nothing was found except for small holes tens of meters deep.

"What's going on!!" the two of them said in unison.

After a hard day's work, so many materials were wasted, and as a result, there was no gain, and Zhang Yang was disappointed. Yang Ling'er comforted her and said that she would go back and analyze the reason and explore it next time.

Just as they turned to leave, the small hole that had just been blasted disappeared as if it had never happened at all.

Fortunately, this scene was not seen by Zhang Yang, otherwise, he would not have planned to leave here today, because such an anomaly is nothing to him now.

After getting out of the hole, Yang Ling'er felt that the excitement was not enough, so she pestered Zhang Yang to fly for a while. Zhang Yang attached to the root of her ear and smiled and said My good Ling'er, next time, the battery power is not enough.

"When's next time?"

"On the day we got married!"

"You ...... beautiful."