A brown watch lying there quietly in the distance, it looked like a dead object.

"Will it be something that the fairy has newly researched?" Wu Zetian also saw the watch and said curiously.

"I don't know, it's the first time I saw this thing." Li Lingyue also said curiously.

"Anyway, I'll go take a look." Shangguan Wan'er said with a smile, came to the front, picked up the watch and observed.

"His Royal Highness, you see there are pointers on this watch."

"Pointer? Let me take a look." A hint of surprise flashed in Wu Zetian's eyes, and he stepped forward to check his watch.

"Wan'er, this is not one pointer, but three pointers." Wu Zetian frowned and said seriously.

"What do the three pointers represent?" Li Lingyue also pondered.

"Just ask the fairy one day. Anyway, it must be a good thing." Shangguan Wan'er said affirmatively.

"Indeed." Wu Zetian also nodded in agreement.

On the other side, Jiang Yichu didn't know what happened here, so he picked up the metal he had collected on the mountain and checked it.

The silver metal was better than he had imagined, with a uniform texture and shining silver light.

"Three pieces of metal are enough to build an engine." Jiang Yichu put down the metal, took the blueprint and looked at it carefully.

When the words fell, he walked to the warehouse without rest.

Build the engine early and leave this deserted island early.

"Hey, fairy, why are you back again?" Shangguan Wan'er was looking at her watch when Yu Guang caught a glimpse of Jiang Yichu in the distance and said in surprise.

"What are you doing? Why haven't you returned to the house yet?" Jiang Yichu asked, seeing the three of them standing here, frowning deeply.

"Xianren, what is this? Wan'er just discovered it." Shangguan Wan'er was not afraid to face the immortal's scolding, she smiled and shook the watch in her hand towards Jiang Yichu.

"Oh, you said that thing is called a watch." Jiang Yichu glanced at it and said.

"Watch?" Shangguan Wan'er was puzzled.

"Fairy, what is this watch used for?" Wu Zetian asked.

"The watch is used to see the time. Unfortunately, there is no electricity, so this has not been fully invented yet." Jiang Yichu said.

"Look at the time? Electricity?" Wu Zetian was even more puzzled.

"Hey, you definitely don't understand it anyway, so quickly return the watch to me." Jiang Yichu said so, he was about to get the watch.

But at this time Li Lingyue said: "Xianren, Yue'er doesn't understand what you mean, but it probably means that this watch lacks electricity and can't be started, right?"

After Jiang Yichu's movements, he looked at Li Lingyue in surprise, obviously not expecting her to understand this meaning.

"Yue'er, why are you so smart? You can see this?" Jiang Yichu said with a smile.

"Fortunately, if the fairy lacks electricity, why don't you use sunlight?" Li Lingyue thought for a while and said.

"Fairy, everything grows by the sun, why don't you use sunlight to drive this watch?" Wu Zetian also said.

"Sunlight? Why didn't I expect this before?" Jiang Yichu trembled and said excitedly.

After saying this, he picked up his watch and started making solar engines.

After a while, a solar engine was made.

"Look, can you move it." Jiang Yichu said expectantly, injecting solar energy into the watch.

The watch, which was motionless, began to move slowly, little by little.

"Fairy, this is really moving, and it's amazing?" Shangguan Wan'er said in surprise.

"What the hell is this? How did you do it, fairy?" Wu Zetian said unbelievably.

"I didn't expect to be able to move." Jiang Yichu also froze for a moment, and said with a smile.

He just wanted to try it, but it was really useful.

"Xianren, now this watch can move, can you tell me what it is doing?" Li Lingyue asked.

"Looking at the time, aren't there three hands on this? They correspond to hour, minute, and second." Jiang Yichu said.

"It turns out that this is the case. What does the fairy want to express?" Wu Zetian nodded suddenly and said.

"It's nothing, even if you count twelve hours a day, you can accurately see the time." Jiang Yichu introduced.

"Twelve hours a day? Start counting from childhood? Good fellow." Wu Zetian heard the words and moved in his heart.

Without Jiang Yichu elaborating, she also knew what it meant.

"Fairy, this watch is amazing, but we are on a desert island, what use is this watch?" Shangguan Wan'er thought for a while and said.

"That's right, what you said seems to make sense." Jiang Yichu was perplexed.

Yes, it's useless to watch the time on a desert island.

"Wan'er, you can't say the same. Although this watch is useless on a desert island, it will be useful when you go out." Wu Zetian glanced at Shangguan Wan'er and said.

"That's right, if this kind of magical thing can be spread out, it will definitely be loved by the people of Zhou Dynasty." Shangguan Wan'er said in agreement.

"Well, the key issue is that you can't get out now." Wu Zetian looked at Jiang Yichu again.

"Don't worry, I'm already studying the engine, it's only a matter of time before going out." Jiang Yichu said with a smile, although he didn't completely understand what Wu Zetian said just now.

"Xianren, when can the engine be studied?" Shangguan Wan'er said after a moment.

She didn't want to wait too long.

"It's just two or three days of work. After all, I have all the materials ready." Jiang Yichu took out the blueprint and took a closer look, and said with certainty."Great fairy, with the engine, can we go out?" Wu Zetian was overjoyed and looked at Jiang Yichu.

Li Lingyue's eyes also moved to him.

"Yes, the engine is specially used for starting. As long as we have this thing, we can go out." Jiang Yichu was stunned, and then nodded seriously and affirmatively.

"Okay, then I will wait for news from the fairy." Wu Zetian nodded vigorously.

"Xianren, is there anything Wan'er can help?" Shangguan Wan'er asked eagerly, looking at Jiang Yichu."No, just wait for my news. I can handle this engine alone. If you leave it to you, you won't understand it anyway." Jiang Yichu thought for a while and said.

"All right." Shangguan Wan'er felt disappointed in her heart, but she nodded and said.

"Yeah." Jiang Yichu hummed slightly, returned to the room, and continued to study the engine.

Two days passed quickly, and Jiang Yichu’s surprised voice came out this day: "I succeeded, I really succeeded."