216: Chapter 216 The Light Amidst the Noise, Kunlun's Seventh Rank!
Countdown to the arrival of the sentry ship, sixty-eighth day.
Nine o'clock in the morning.
The medical transport vehicle from Longmai Base arrived at the underground parking lot of Pangu Laboratory.
When the wheelchair was pushed in, almost everyone on the B2 level put down what they were holding.
Lin Weiguo sat in the wheelchair, wearing a faded, light-blue hospital gown, his hands resting on his knees, without making any voluntary movements.
His hair had turned completely white and was even shorter than when Su Che last saw him; it was that neat cut given by medical staff.
Academician Chen Shian followed behind the wheelchair, said a few words to the caregiver pushing it, and had him wait outside the door.
Su Che did not walk over; he confirmed the readings of the acquisition system at the main console, pulled the parameter table of the flexible Brain-Computer Interface to the secondary screen, and rested his hands on the edge of the console.
Lin Weiguo's eyes were open.
But that kind of openness was not the same as being awake.
It was more like the life-support system was maintaining a minimum operating state; on the surface, there was no visible difference, and only the data knew what the situation was inside.
Xiao Yuan took the acquisition cap out of the anti-static bag, checked the electrode contacts, walked over to Lin Weiguo and crouched down, gently put the cap on, and fastened the retaining strap under his chin.
The 32-channel real-time brainwaves appeared on the main screen.
Theta waves.
The amplitude was between two and four microvolts.
It was as expected, just like the historical EEG chart Academician Chen Shian brought.
Su Che switched the state of the two-stage series noise reduction model to active monitoring.
"Begin calibration."
The algorithm stabilized the cutoff frequency of the first-layer filter, confirmed the background noise baseline, and performed a real-time comparison against the three sets of ultra-deep suppression samples in the training set.
Fifteen seconds later, the first classification result came out.
Real neural signal, confidence level ninety-four percent.
Zhao Mingyuan leaned over from his workstation, took one look at the number, retracted, and said nothing.
Academician Chen Shian stood next to the wheelchair, turned Lin Weiguo's wrist over, checked the monitor readings, and put his hand back.
"Pulse is stable, we can proceed."
Su Che turned on the reverse pathway encoder, set the priority to the lowest, activated only the first three directional regions of the somatosensory cortex mapping, and compressed the pulse intensity to thirty percent of the safety threshold; it was just a probe.
The encoder pushed a standard short pulse.
Right anterior region of the somatosensory cortex, two-hundred-millisecond interval rhythm, low priority.
Lin Weiguo did not make any external movements.
On the main screen, a faint peak appeared in the brainwaves, lasted for about two seconds, and then flattened out again.
Xiao Yuan stared at the waveform, drew a vertical line on his notebook with a pen, and wrote two words next to it: Response.
Academician Chen Shian pulled a chair from the side test bench, sat down next to the wheelchair, took out that thick-tipped marker, didn't open it, and held it with both hands.
Su Che pushed the encoder intensity up one notch, activated five directional regions, and switched the pulse interval to the high-priority two hundred milliseconds.
On the main screen, the baseline of the theta waves began to produce regular, subtle tremors.
These subtle tremors carried a clear rhythm.
"It is responding." Xiao Yuan's voice was half a level softer than usual.
At this moment, a waveform feature almost identical to the one during the last preliminary test appeared on the EEG.
It was not a theta wave, but a segment of delta waves mixed into the theta waves; the amplitude was nearly double that of the surrounding area, the shape was irregular, but it had internal logic.
Su Che pushed the second-level threshold of the noise reduction model down by two notches to let this signal come through completely.
The signal came through.
Then came the decoding.
At this moment, the quantum encrypted closed-loop communication protocol locked all external frequency bands; the entire processing link was a completely closed loop.
The high-precision neural signal decoding module ran three rounds of iterations, extracted the temporal features of that delta wave segment, translated it into digital format, and output it to Su Che's main console screen.
A line of text appeared on the screen.
It was not a complete sentence, like a few road signs left on a long road.
[ ...Data... Keep... Don't... Stop.]
On the B2 level, no one spoke.
The buzzing of the air conditioning became exceptionally clear.
Academician Chen Shian placed the marker on his knees, stared at that line of text, pressed the brim of his hat down, and then lifted it again.
Su Che input a short feedback pulse into the encoder.
The feedback signal used rhythm.
A high-priority triple short pulse, which meant: Received.
The brainwaves on the main screen stabilized for nearly two minutes after this, and no new information appeared.
Then, the second segment of the signal was pushed over.
It was still fragmented, but a bit more complete than before.
[ ...Blueprints... Your grandfather... Hid... More than... Three.]
Su Che took a screenshot of that line of text, saved it into the encrypted storage, and added a timestamp.
He typed a few words on the keyboard and used the reverse pathway encoder to convert this inquiry signal into rhythmic pulses and pushed it over.
The content of the inquiry was: Where are the blueprints?
He waited about forty seconds.
The third segment of the signal came out.
This time the amplitude was higher than the previous two, and the duration was longer; the noise reduction model retrieved it completely, and the decoding ran twice for confirmation.
[ ...Kunlun... Core Node... Seventh... Compartment.]
Su Che placed the three segments of information side by side on the screen, staring at the three characters "Seventh Compartment".
Longmai Base, Kunlun Archive, Seventh Compartment.
The fourth hidden door buried by his grandfather.
It was not in the data graveyard, but in a physical cabinet in the archive.
Academician Li Zhengyang walked over from the direction of the weapon adaptation area, without his cup, stood on the side of the public large screen, read those three lines of text from beginning to end, and retreated.
Academician Chen Shian sat up a little straighter in his chair and gently held Lin Weiguo's wrist next to the wheelchair.
"Old Lin." Academician Chen Shian's voice was very flat, "We have heard everything you said."
The brainwaves on the main screen leveled off.
It was a kind of quietness after exhaustion, completely different from the previous ultra-deep suppression; it was more like he had truly fallen asleep.
Truly asleep.
Xiao Yuan checked the various physiological data once more, stood up, and gently removed the acquisition cap from Lin Weiguo's head.
"All indicators are stable, even more stable than before he arrived."
He continued, "There is an explanation: when a piece of neural activity suppressed in the deep layers for a long time is activated by an external pathway and completes its output, the local metabolic pressure of the brain will drop."
No one responded to this scientific explanation.
Wen Bo stood at the corner of the corridor, hands in his work uniform pockets, unmoving.
Academician Sun Qiwen placed his enamel mug on top of the cabinet and did not go to pick it up.
The caregiver came in and pushed the wheelchair out of the B2 level.
Academician Chen Shian stood up, followed them out for a distance, then turned back, stood at the entrance of the B2 level for a while, and walked towards the main console.
"Brain-Computer Interface upgraded version, live test completed." His voice was a bit clearer than usual, "There were no adverse reactions from a medical perspective, and bidirectional interaction of neural signals was established."
Su Che did not respond immediately; he went over those three segments of information from Lin Weiguo again.
Then, the system panel popped up quietly in his consciousness.
[Ding! Main R&D task "Let the pilot's brain fly the plane directly!" has been completed!]
[Brain-Computer Interface bidirectional interaction system upgraded version full system verification passed!]
[High-precision decoding accuracy of neural signals reached the microvolt level, end-to-end closed-loop latency was compressed to eleven milliseconds, the success rate of external signal isolation was one hundred percent, bidirectional interaction in the live test was established, and the safety current limit was not breached throughout the process!]
[Task reward: 650,000 skill points!]
Six hundred and fifty thousand.
Su Che closed the panel, pushed a copy of the encrypted backup of the three segments of information just now to Lieutenant General Peng Zhenbang's dedicated line, and attached a line of text:
"Longmai Kunlun Archive, Seventh Compartment, please arrange for retrieval."
The reply came quickly, with only two words:
"Received."
Zhao Mingyuan slid his swivel chair out at his workstation, took a look at Su Che, pushed the chair back, opened the next code window, and said nothing.
Liu Huaqiang added a line to that page in his notebook and tucked his pencil back behind his ear.
Academician Sun Qiwen picked up the enamel mug from the cabinet again and walked back to the U-shaped array area.
The sound of keyboards returned to the B2 level.
Qin Lan poked her head in at the door, "Consultant Su, shall we arrange the departure to Longmai Base?"
Su Che packed the complete upgraded Brain-Computer Interface equipment into an anti-static hard case.
"Depart."