I live in the Martian wilderness!

Gu Yu was once again faced with a difficult choice. This was no longer a desperate decision, but it was a tightrope walk that required immense courage!

A moment later, he clenched his fist and said fiercely, "Alright! Let's gamble that they can't see it! But we can't take too many risks! We must convey the maximum amount of information with the fewest bytes!"

"Xuan, immediately extract the most crucial formulas from those three technologies—[Taiyi Xuanjin], [Liangyi Juxing], and [Qiyao Ruishi]—from that blueprint!"

"We won't explain anything, nor will we attach any pictures! We'll just post what's quoted! The world's top brains will definitely understand!"

"Message draft complete, Lieutenant Colonel!"

"Very good." Gu Yu looked at the few lines of simple formulas that he couldn't understand. "Xuan, start the BJ07537 encrypted compressed file. The decompression password is... I'll say the numbers and you add them in. Only Earth can decrypt the numbers to get these formulas."

Xuanjian responded instantly: "Received, Lieutenant Colonel."

Gu Yu recited a string of random numbers whose meaning even Xuan Jian couldn't decipher.

These six sets of numbers correspond to:

5273—Class I!

3839—Contact!

132—Come quickly!

856—Mars!

859—Urgent!

41424344—It has to be the fastest!

Three, two, three, three—carry it!

43521222324 — The largest communication device!

Taken together, it reads: "Get to Mars immediately! The situation is extremely urgent! We must act as fast as possible! Bring the most advanced communication equipment!"

This code is essentially a speech manuscript, mainly consisting of broken down words and homophones. It is impossible to crack without comparing it with the original text.

"Lieutenant Colonel, the information encryption is complete."

"Okay, Xuan, thank you for your hard work." Gu Yu felt as if a heavy burden had been lifted from his heart. "Now, we just have to wait for the next launch window for Tianwen-1."

......

【Sol 33】

[Earth - BJ Space Flight Control Center - Mars Communication Support Team]

In the dead of night, the only sounds in the command center were the low-frequency hum of the instruments and the occasional tapping of keyboards.

Qin Nuannuan yawned and rubbed her slightly sore eyes. It was her shift today in her Mars communications support team.

Besides her, there were two other young engineers in the team, both of whom were key personnel drawn from various departments.

"Here it comes!" the engineer in charge of signal acquisition whispered, instantly dispelling everyone's drowsiness.

On the main screen, the indicator light representing the downlink of Tianwen-1 turned from red to green precisely on time.

"Signal locked, link stable." Qin Nuannuan immediately sat up straight, skillfully operating the control panel. "Receiving data packets... Hmm?"

Her brows furrowed slightly.

"What's wrong, Nuan Nuan?" her colleague asked.

"The data packet... is a bit strange." Qin Nuannuan's fingertips flew across the screen, bringing up the data frame structure analysis.

The data block was automatically sent to the decryption program, but just seconds later, a glaring red error message popped up on the screen:

[Decryption failed: Encountered military-grade AES-8192 asymmetric encryption. Key missing. Estimated brute-force attack time: 127.4 years.]

"One hundred and twenty-seven years?" Another engineer nearly jumped out of his chair in shock. "Are you kidding me! Lieutenant Colonel Gu Yu sent us a file that takes a century to open?"

Qin Nuannuan didn't speak; her heart sank suddenly.

She knew Gu Yu would never do something so pointless. This inaccessible file must be extraordinary.

But how could Gu Yu have such encryption measures? She suddenly remembered that she had been told in the confidentiality training course at the Astronaut Center that every deep space astronaut has their own encryption methods.

"A one-time password book..." Qin Nuannuan murmured to herself, her expression instantly turning serious.

Without any hesitation, she immediately grabbed the emergency phone on the table that connected to the highest command level, bypassed the duty officer, and connected the line directly to the general duty room of the command center.

"This is the Mars Communications Support Team, Qin Nuannuan! I have a top-priority emergency that needs to be reported immediately and directly to Commander-in-Chief Zhang Jianguo!"

……

Fifteen minutes later.

Commander Zhang Jianguo, already fully dressed, walked into the command hall with a solemn expression.

Behind him followed several equally sleepy-eyed but serious-looking confidential staff officers.

"What's the situation?" Zhang Jianguo didn't waste any words.

"Reporting to Commander-in-Chief!" Qin Nuannuan immediately stood up and pulled up the information on the screen. "We have just received the latest communication from Lieutenant Colonel Gu Yu."

"But the data blocks that even Sky Dome couldn't crack, we suspect are Lieutenant Colonel Gu Yu's one-time codebook."

Zhang Jianguo's gaze swept over the warning box that displayed "127 years required to crack".

His pupils contracted sharply! His intuition for codes, honed during his military career, made him instantly understand everything.

"Seal off this place immediately!" Zhang Jianguo turned around abruptly and gave the order to the guards behind him.

"Upgrade security to 'Red One'! The three members of the communications team present are temporarily isolated and all external communication is cut off!"

Qin Nuannuan's heart sank. She had guessed correctly.

He turned to Qin Nuannuan and the other two, his tone softening: "Don't worry, this is just a temporary top-secret measure. You've done a good job."

After saying that, he took the mysterious number and strode towards the confidential decoding room at the deepest part of the command center.

……

The atmosphere inside the confidential decoding room was so oppressive it was almost frozen.

"Immediately... immediately activate Contingency Plan 055! I need access to the Qiushi manuscript. I'll submit the report now, and it will be approved within five minutes!"

Even as the commander-in-chief, one must follow the strictest procedures to activate this "life-or-death pact" that represents the highest trust and entrustment.

Ten minutes later, the atmosphere in the confidential decoding room was so oppressive it was almost frozen.

Three confidential staff members wearing white gloves used three different keys to open a heavy safe and took out a vacuum-sealed red document bag.

The file bag contained the manuscript of "Seeking Truth".

"Begin decoding," Zhang Jianguo ordered in a deep voice.

These decryption experts were selected through a rigorous process, and each one represents the highest level of expertise in the country in this field. Their level of secrecy is even higher than that of Zhang Jianguo.

"First set of coordinates: (1, 3, 2)..." The expert's finger moved across the manuscript, "Corresponding character: 'Speed'!"

"Second set of coordinates: (eight, five, six)...corresponding character 'come'!"

One Chinese character after another was translated one by one.

When the last coordinate was found, a short sentence filled with anxiety was pieced together.

But this is not the end.

"Commander Zhang, this should be the key."

The decryptor entered the phrase "Hurry to Mars! The situation is extremely urgent..." into the compressed file key verification program.

On the "Sky Dome" interface, the red warning that originally indicated it would take 127 years to crack the code instantly turned into a green file icon after the correct password was entered.

A one-time password book is both a lock and a key.

The folder opened. There were no pictures, no videos. Only a few lines of simple, formula-like characters, quietly displayed in the center of the screen.

"Sky Dome... immediately begin model deduction and semantic analysis," Zhang Jianguo ordered, while simultaneously opening his personal work terminal tablet to receive the final results.

He stared at the incomprehensible symbols, his heart filled with immense unease and anticipation. What was it that Gu Yu had gone to such lengths, even using the ultimate code, to send back?

A few minutes later.

"drop--"

Zhang Jianguo's personal tablet made a soft sound as he opened the analysis report generated by the Sky Dome.

-----

(P.S.: Available tomorrow!)