Everything under the sea feels novel to them.

It was also the first time for Ling Yuan to come to the bottom of the sea. Because he had adapted to the lights, even the dark sea bottom was as bright as daytime in the eyes of a few people.

"Is the bottom of the sea so beautiful?" Xiao Hongyu shook her pink fish tail.

Looking around, his pupils were filled with novel brilliance.

Even if there is Bai En, the Demon God of the Sea, he is still a human being after all.

She couldn't live long under the sea, and her vision would be affected to a certain extent. This was the first time she could see the seabed so clearly.

"It's all thanks to Dora-chan."

At this time, a girl with short black hair swam over and said with a smile.

"Who are you?" Hongyu asked curiously.

Yuan Jingxiang smiled slightly and stretched out her hand: "Hello, I am Jingxiang."

"Hello, Lian Hongyu, just call me Hongyu." Xiao Hongyu smiled back, stretched out her hand and held Shizuka's hand.

"practice?"

Shizuka was stunned, what a rare surname, a bit like the name of that country.

But she didn't think much about it and continued: "Is Sister Hongyu a friend of Nobita and Dora-chan?"

"Well, to be precise, he is Doraemon's friend, and I only met Nobita yesterday." Ruby nodded.

"Huh? So, sister, you are also from the future?" Shizuka said in surprise.

"You can say that." Hongyu smiled softly.

In fact, her world can be considered ancient.

"Oh oh oh! Come on!"

Suddenly, a burst of laughter came.

As the water surged, a whale appeared in front of everyone.

And Xiaoshi was standing on the back of the whale, looking like he was riding the wind and waves.

Seeing this scene, Ling Yuan couldn't help holding his forehead and sighed: "This child will not grow up."

"Isn't that great? It's best to stay childlike." Doraemon said with a smile.

"It seems very interesting! Husband, let's try it too!" Fat Tiger also showed interest.

"Huh? It's very dangerous, isn't it!" The young man was a little discouraged.

"Stop being so verbose! Just leave if you are told!"

However, Fat Tiger didn't care at all, and directly hugged Xiaofu's neck, swam his fat fish tail, and swam forward.

However, as soon as the two of them wanted to go over, they were disrupted by a school of fish passing by.

"Hehehe." Sophia covered her mouth and chuckled.

She hasn't been as happy as she is today for a long time.

…

As time went by, night came soon.

Doraemon took out waterproof ropes from his pocket and formed a big circle.

A circular water wall is formed to isolate the sea water.

In this area, no matter how fast the water flows outside, there will still be no water inside.

In this way, Doraemon opened a hole in the sea with a rope.

Sophia was obviously shocked by this magical prop.

Subconsciously walked to the edge.

Stretching out his hand, the moment it passed through the rope coverage, it appeared in the sea water.

When I took it out again, except for the slight ripples on the water wall, all the water on my hand had disappeared, and no trace of water had been brought in.

"Why?"

Such props not only surprised Sophia, but also Xiaoshi and Hongyu.

Ling Yuan followed the two of them and joined in the fun.

Just like that, the three of them squatted on the edge of the rope like fools, stretched out their hands, retracted their hands, stretched out their hands, and retracted their hands.

"Dora-chan, do you think that if I wash my hands with hand sanitizer here, put my hands in, and take them out again, will my hands be free of bacteria at all?"

Ling Yuan pointed at the water wall and thought suddenly.

"Ah?"

Doraemon was stunned.

Others were also stunned and fell into deep thought.

It seems that this is the truth.

"But it's incredible. Doraemon is just like the legendary Manatia."

Seeing the somewhat silent atmosphere, Sophia looked at Doraemon in wonder.

"Manatia?"

Others also cast curious glances.

Sophia nodded and said: "Yes, I once heard my grandmother say that according to legend, when our mermaid clan is in danger, the God of the Sea will use the mermaid sword to save us. It is also a legendary sword."

"Mermaid sword?" Shizuka asked curiously.

"It was originally guarded by our ancestors for generations, but now its whereabouts are unknown."

"Speaking of which, that happened five thousand years ago. In fact, many people no longer want to pass on this legend."

"Legendary sword? It's so powerful." Fat Tiger said.

"It's really romantic." The husband said.

Nobita had a sudden thought: "By the way, Doraemon, let's go find the Mermaid Sword!"

"Huh?" Doraemon was surprised.

"Can this kind of thing be done? Doraemon." Sophia looked at Doraemon in surprise.

"Well, group leader, do you know? The whereabouts of the Mermaid Sword." Doraemon thought for a while and looked at Ling Yuan.

It is better to leave this kind of matter to the all-knowing and all-powerful group leader.

Nobita and others were stunned, and Nobita realized: "Does Brother Lingyuan know?"

Obviously, in his mind, this was the first time Doraemon asked someone about a problem.

"I know, I know, but the sword is not on Earth. If you want to find the sword physically, you don't have to think about it." Ling Yuan said calmly.

"Not on Earth?" Sophia was stunned for a moment, then seemed to think of something and looked at Ling Yuan in surprise: "Could it be that..."

Ling Yuan nodded: "Yes, on Blue Mercury."

"Huh? On Blue Mercury? That's really difficult." Nobita said disappointedly.

"So, the idea of ​​finding the Mermaid Sword has been completely shattered."

"Physical methods are indeed difficult, but if you use metaphysical methods..." Ling Yuan said.

"Metaphysics? What kind of science is that?" Fat Tiger asked.

"Well, please remember one sentence: Quantum mechanics is the answer to indecision."

"But if you want to summon the Mermaid Sword, you need to rely on yourself, Sophia." Ling Yuan looked at Sophia and said.

"Rely on me?" Sophia was confused.

Ling Yuan folded his arms and said leisurely: "As we all know, the mermaid armor, mermaid sword and the crown on your head are the same set."

"Huh?" Sophia was stunned.

Subconsciously, he touched the crown on his head.

A set? Why didn’t she know?

"Now that we've come to this point, I'll tell you directly." Ling Yuan walked over.

"Please tell me, Lord Ling Yuan!" Sophia looked at Ling Yuan who came in front of her and said solemnly.

"This matter is related to the future of the entire mermaid clan!"

"In your mermaid tribe's mythology, during the war against the strange fish tribe, did a legendary warrior appear?" Ling Yuan asked.

"Yes." Sophia nodded.

"Do you know that soldier's name?"
To be continued...