Chapter 30 Chapter Two "Still holding the pipa half-hidden"

Not long after he went to work this morning, Xu Zhenyu received a fax at the Nanshan Observatory. He opened it and found that it was sent by Yang Jixian from the tugboat "Taishan" in the South China Sea, so he read it carefully. If you don't read this fax and telegram, you will be surprised.A thick layer of suspicion floated over his handsome face.For three years, he has been thinking hard about whether there is any other information stored in the copper ball, and is often troubled by not being able to find the answer.Today, he really did not expect that it was Fang Yutian who provided the new clue, and it turned out to be from the bottom of the South China Sea.He took a closer look at the recording chart that recorded the ultrasonic oscillation curve, and there was nothing wrong, the pattern of the ultrasonic signal was exactly the same as the microwave signal of the copper ball.In this way, Fang Yutian's guess may be right.

Since the copper balls in the sea and the copper balls on land have similar signal patterns, will the two copper balls be the same?If it is the same, shouldn't the copper ball on land also emit ultrasonic signals?Ask one more step, could this ultrasonic signal be the password to activate another kind of information stored in the copper ball? Xu Zhenyu came out of the office and walked to the door of the director's office.He raised his hand to knock on the door, hesitated, then put it down again.He thought that Professor Huang often warned him not to announce conclusions prematurely without sufficient grounds.Why not be more cautious this time?Thinking of this, he quietly left the director's room.He went down Nanshan, took a car, and went straight to the Provincial Science and Technology Museum.

The Science and Technology Museum is located on a bustling street in the city, which is a modern complex of exhibition halls.Inside the neatly trimmed walls of holly trees along the street, there is a small square with green grass. In the center of the square stands marble statues of famous scientists and inventors in ancient and modern China.Xu Zhenyu didn't appreciate these sculptures and architectural styles, and walked straight to the exhibition hall.When he hurried up a row of stone steps, a group of middle school students came out of the hall door of the exhibition hall with great interest.He passed between them with difficulty and entered the exhibition hall.

In the center of the exhibition hall, there is a hexagonal marble pedestal with a height of half a person. The pedestal is covered with a piece of deep red gold velvet, and the wide corners are half-hanging around the pillar.The world-famous copper ball is placed on this pedestal, shining golden and dazzling.A brief explanation is engraved on the front of the pillar platform, and the words are pasted with gold. A female student with short hair was staring at the copper ball blankly, thinking about something.It seems that she and the group of middle school students who just walked out came here to visit together, but she was so fascinated by the copper ball that she couldn't forget to return.

"Xiaoying!" Xu Zhenyu called out. It turned out that this Xiaoying was Ren Xiaoying.But after entering the first grade of junior high school, her father Ren Sihong said: "The children are already in middle school, so let's change the word 'Xiao' to 'Xiao'." Since then, her name has been changed to Ren Xiaoying.According to her father, although she is only eleven years old this year, she is younger than most of the classmates in the class, and she won the first place in the city's mid-term mathematics examination! When Ren Xiaoying heard someone greet her, she turned her face away.She is not as fat as she was when she was a child.A pair of black eyes, big and round, and the brows look extremely intelligent.That handsome ruddy face is still full of the childishness of a little girl.When she saw that it was Xu Zhenyu, she happily greeted him:

"Uncle Xu, you are here to visit too!" "I'm here to contact you about something." Xu Zhenyu said, "What were you thinking just now?" "Look, the base under the copper ball seems to be a diagram of eight trigrams." Ren Xiaoying said, pointing to the bottom of the copper ball. "It's quite similar." Xu Zhenyu also felt the same way.In fact, he had already noticed this when he was studying the copper ball star map three years ago. "Uncle Xu, I have read "Fun Mathematics". The book says that the earliest binary in the world is Chinese gossip. This is what the great German mathematician Leibniz said." She smiled innocently, "I Just now I thought, this gossip is 000, 001, 010, 011, 100, 101, 110 and 111 in binary, that is, 0, 1, 2, 3, 4, 5, 6, 7 in decimal. Could it be the sky? Where are the eight codes of Yuan four?"

"Password?" Xu Zhenyu was shocked. He immediately remembered some things before the bronze ball was unearthed, and pointed to the gold lettering on the front of the pillar and explained, "The short-wave signal of the copper ball is '嗞, 嗞—, 嗞—,嗞; 嗞― , 嗞―' If you replace the short 'beep' with O and the long 'beep' with 1, it becomes 01, 10, and 11. Isn't it also binary? Also, the copper ball The microwave signal 'beep, beep—' of the unearthed code is also binary 01. Does it have two microwave codes of 10 and 11? We have only used 01 to command the copper ball to rise out of the ground, but we have not tried 10 and 11. pass!"

After all, Xu Zhenyu was so happy that he took Ren Xiaoying's hand and said: "Come on, let's go to the laboratory hall!" They walked through a long corridor and came to the laboratory hall.This laboratory hall is the most exciting part of the science and technology museum, it provides audiences and enthusiasts with various scientific experiment methods, and can also provide necessary guidance. Xu Zhenyu found Zhang Kai, the director of the laboratory. "Xiao Xu, you're here again!" Zhang Kai greeted Xu Zhenyu loudly when he saw Xu Zhenyu.The director was over forty, with a beard and a warm heart.He had a very good impression of Xu Zhenyu when the copper ball came out of the video.After the copper ball was exhibited publicly, Xu Zhenyu came here once or twice a month, and they gradually became familiar with each other.Xu Zhenyu cherishes Zhang Jie's enthusiastic help, and Zhang Jie respects Xu Zhenyu's spirit of continuous exploration.Today, three years later, the two have already become close friends.Although Xu Zhenyu is well-known in China, he is also a well-known person in the world, and has the title of associate researcher, Zhang Kai still affectionately calls him Xiao Xu.

Xu Zhenyu explained his purpose to him.He was very straightforward and agreed.Zhang Kai put a replica of a copper ball on a rubber wheel trolley and pushed it to the exhibition hall himself.Xu Zhenyu and Ren Xiaoying followed him to the exhibition hall.Zhang Kai took the real copper ball off the pedestal and put it on the rubber-tyred trolley.Then, the imitation on the car was placed on the pedestal, and a "imitation" sign was hung.Several visitors looked at them with curious eyes.They carefully pushed the real copper ball into a laboratory in the laboratory hall. Xu Zhenyu handed over the record diagram of the ultrasonic oscillation curve provided by Fang Yutian to Zhang Kai.Zhang Kai brought an ultrasonic generator and manipulated it according to the pattern on the recording chart.Xu Zhenyu sat under the wall, nervously waiting for a certain situation that might arise.Ren Xiaoying stood beside Xu Zhenyu, looking at Zhang Jie's every move curiously.

According to the pattern in the picture, Zhang Kai repeatedly sent out three kinds of ultrasonic signals in binary, 01, 10, and 11.As a result nothing happened. "You try the eight signals on the gossip again." Xu Zhenyu said. Zhang Kai sent out eight ultrasonic signals in turn.Ren Xiaoying stared at the copper ball with her big round eyes, but nothing happened. "Try it with a microwave?" Zhang Kai asked.He moved a microwave transmitter and adjusted the transmission knob to the microwave frequency with a wavelength of 21 centimeters.Xu Zhenyu stood up: "I'll give it a try."

Zhang Kai gave him his seat. Xu Zhenyu used microwaves to send out the eight signals on the gossip, and tried each signal several times.However, there is still no result.He frowned tightly and said nothing. "Uncle Xu, you haven't tried the two sets of codes 10 and 11 yet!" Ren Xiaoying said stubbornly. "Try it." Xu Zhenyu gave up hope, "I'll try the 10 passwords first." He pressed the key, and several sets of "beep-beep" came out from the microwave transmitter. An unexpected thing finally happened: a soft purple light emitted from the outside of the copper ball, and then, the purple light spread out layer by layer, gradually filling the entire laboratory. The three of them were astonished. Then, from nowhere came bursts of strange music.This piece is powerful and full of rhythm.Its timbre and style are something they have never heard in their lives.It has an indescribable alien atmosphere, which makes people who listen to it have a feeling of falling into the abyss of the universe. "I'm afraid!" Ren Xiaoying's face turned pale, and she cried out. Xu Zhenyu hurriedly pulled Xiaoying in front of Bai Ji, and held her shoulders with both hands.He looked at it calmly, suddenly turned pale with shock and said: "What is this place?" The copper balls, instruments, worktables, window sashes and walls of the laboratory that were still beside them just now disappeared without a trace.They don't even know if they're still where they were, if they're still on Earth. Sitting there, Zhang Kai was also stunned.He and Xu Zhenyu looked at me and I looked at you, but couldn't say a word for a long time. There is a vast expanse of yellow sand in front of me, extending to the end of the earth.The horizon seems to be more distant than usual, and Cang Yao is more profound than usual.The sky is gray with occasional yellow clouds.A gust of wind blew sand and rocks away, and Ren Xiaoying couldn't help covering her face tightly with both hands. Not far from them, a thick cable stretching straight to the sky, below the cable is the ground station of the cosmic elevator. "Look!" Zhang Yu shouted. A magnetic cushion car is speeding towards the ground station of the Yuchuang elevator. A majestic space flight tragedy unfolded in front of them...