I started with a ship full of max-level veterans, and I'm just a complete noob.

A white petal stuck to the sole of Jiang Ming's shoe as he stepped into cubicle 502, leaving a faint damp mark on the cement floor.

The night shift bell had already rung. Jiang Ming locked the wooden door, drew the curtains, and placed Lei Zhenbang's metal file box on the worktable.

He recorded the time the box was opened, verified the seal number, and then used the key given to him by Factory Director Zhang to unlock the lock.

The three notebooks were arranged by year in the box, covered with moisture-proof kraft paper, and underneath were calculation scraps and several photos of old tools.

The first book contains records of vacuum tube design, spanning from 1947 to 1948.

The space charge calculation, gate size, and cathode coating ratio all leave test data, and the rework area is also marked with instrument error and power fluctuation.

This is a record from a seasoned device engineer, but the technology is still within the scope of publicly available information and in-house processes at the time.

Jiang Ming pasted the classification labels on the notebook and opened the second notebook.

The preliminary research on Lightning-7 took up most of the content, and the classified pages have been sealed by the project team, leaving only some methods and sketches.

Lei Zhenbang breaks down a fixed frequency into multiple frequency points and then switches them using non-equidistant sequences, always focusing on the continuous links that the interference system cannot avoid.

A folded sketch shows three staggered time windows, with pencil annotations next to them.

The jammer can chase frequencies, but must first hear the target; there will always be a time difference between identification and tracking.

When Aksai cracked the golden ratio frequency hopping, Jiang Ming also seized this time difference.

Lei Zhenbang used it to help his own radar escape tracking, while Jiang Ming used it to deduce the fixed framework of the enemy system along the frequency switching gap.

Two technological routes, separated by seven years, converge on the same constraint.

First, find the conditions that the system cannot avoid, and then extract the patterns from those conditions.

Jiang Ming closed the second book and took out the last book from the box.

The yellowed cover bears a line of black ink: "Development Trends of Amplifying Devices, An Initial Exploration of the Possibilities of Semiconductors," March 1949.

The kerosene lamp wick had already developed a burnt tip. Jiang Ming cut the wick short and turned to the first page.

The previous pages excerpted news from overseas journals, stating that Bell Labs has announced a point contact transistor, and that germanium crystals can handle signal amplification.

Lei Zhenbang did not stop at the news itself. He pressed on why point contact structures were difficult to keep consistent, and then pointed to the material purity, surface states and impurity distribution.

The concept of a PN junction begins on page five.

By adding controlled impurities to high-purity germanium or silicon single crystals, a stable junction region can be formed inside the material, and carrier diffusion can be controlled by an external electric field.

The following seventeen pages all revolve around this judgment, and the experimental conditions gradually shift from hypothetical to material and equipment.

At that time, the highest level of germanium produced in China was only three nines, and the types and distribution of impurities could not be controlled, so it could only be used for rectification and detection.

Lei Zhenbang wrote in the table that the composite center consumes minority carriers, causing the device gain to drift with temperature.

To observe stable diffusion, the material purity must first exceed nine nines, and single crystal growth, directional cutting, and ohmic contact must also be addressed.

Two experimental proposals were left in the margins of the page.

One method involves repeatedly melting the germanium rod to cause impurities to migrate towards the end, while another method controls the lattice orientation by slowly pulling the rod.

Lei Zhenbang did not provide complete equipment parameters, only stating that the existing high-frequency furnace temperature zone was too short and the temperature control accuracy could not meet the requirements.

Jiang Ming turned to the last page, where the derivation of carrier lifetime and impurity concentration stopped at the third step.

Complex centers are written as boxes with hooks, and changes in minority carrier concentration are indicated by double-dot superscripts.

His fingers remained in the corner of the page.

Four of these self-created symbols are completely consistent with the writing habits in Jiang Ming's kraft paper notebooks.

Even the position of the double horizontal lines above the boundary conditions is the same.

Jiang Ming closed his eyes, his consciousness sinking into the bronze pages of the book.

The pages of the book were not turned, and Lei Zhenbang's name could not be traced.

The flame emitted black smoke, which climbed upwards along the inner wall of the glass enclosure.

Jiang Ming placed the manuscript alongside the first two volumes of notes, checking for ink oxidation, paper watermarks, page number creases, and the special investigation team's authentication stamp.

All physical evidence points to March 1949, and the indentations left by the broken pages also connect to the preceding text.

This posthumous manuscript was indeed written by Lei Zhenbang.

From today onwards, the new directions proposed by Jiang Ming in the semiconductor field can be included in the formal technical archives along with Lei Zhenbang's posthumous manuscripts.

The old approach, which continues the material conditions of 1956, not only conforms to the inheritance of technology but also reduces the review risks brought about by cross-disciplinary results.

However, completed achievements cannot be reverted in time.

Fang Xudong had seen double-diffused silicon triodes and participated in the point-contact germanium diode test of Yuanlei-2. All of those things happened before Jiang Ming came into contact with the manuscript.

If someone were to check the dates item by item, these seventeen pages could only explain the future direction, but could not fill in the gaps in the past.

Jiang Ming wrote down his early ideas for semiconductor devices in the catalog and suggested that they be included in the factory's technical history. The original documents should continue to be kept as classified information.

At the other end of the worktable were the transfer documents from the Fifth Academy that had been delivered during the day, with three stamps on the blue cover.

The official plan retains the 502 team, and Jiang Ming serves as a technical advisor to the Fifth Academy's Electronic Guidance Research Group.

From Monday to Wednesday, I participated in the overall demonstration of the Fifth Academy. From Thursday to Saturday, I returned to 502 to continue to advance the Yuanlei-1 and the high-frequency receiver front-end.

After marking the dates on the calendar, Wu Hanzhang only gave one instruction to the secretary of the Five Academies.

"People can be borrowed, but the project cannot be stopped. If there's an emergency meeting, call 502 first."

Factory Director Zhang immediately signed his name, leaving Jiang Ming's administrative relationship with the Third Electronics Factory, while the confidentiality level would be determined by the higher of the two options.

The Fifth Academy needed his overall assessment, and the 502 Institute also needed him to develop the device; thus, the two tasks fell into the same timetable.

The sound of a grinding wheel coming from the other side of the wall pulled Jiang Ming back to his research room at night.

After leaving the mourning hall, Lao Sun went into Workshop No. 1 and picked out a piece of copper from the inventory to make a box for Lei Zhenbang's personal seal.

When Da Liu delivered the materials in the evening, he only left behind a pack of fine sandpaper and a pair of goggles.

"The master's eyes reddened several times, but he kept grinding after wiping them. I advised him to take a break, but he told me to go check the lathe guide rails."

The grinding wheel turned round and round, copper shavings fell onto the workshop floor, and the sound traveled through the walls into the research room.

Jiang Ming put the three notebooks back into the kraft paper, put them back into the iron box in the original order, recorded the sealing time, and locked them in the lower iron cabinet.

On top of the metal cabinet was the pre-research report prepared by Wu Hanzhang, with the cover stating "High-Frequency Early Warning Receiver Front-End" and the project number still left blank.

Jiang Ming took out the Aksai K-band fragment abstract from the drawer; the 24 gigahertz on the first page was circled in red.

Mining equipment can use narrow pulse illumination radar receivers. If existing vacuum tubes cannot keep up with the threat frequency band, the early warning receivers cannot even protect the signal entry point.

While point-contact devices can still be used for front-end detection and mixing, alarms will eventually need to switch to transistors for stable identification, low-noise amplification, and post-processing.

Inside the iron gate, Lei Zhenbang's vision for high-purity semiconductors, written in 1949, is placed alongside a 24 gigahertz abstract.

High-frequency early warning requires new receiving devices, but the new devices are hampered by the lack of high-purity materials. The two preliminary research projects have already addressed the same equipment gap.

Jiang Ming spread out a piece of graph paper and wrote "high-purity germanium, regional purification, low-noise reception" at the top.

The grinding wheel on the partition wall stopped.

The workshop door then opened, and Old Sun stood at the doorway holding a copper box whose outline had just been ground. He first looked at the graph paper, and then placed the copper box on the worktable.

"What kind of equipment will our factory need to build for this area of ​​purification?"