At the end of March 1941, the air was filled with tension.

A few days ago, the Japanese army secretly mobilized the 33rd, 34th Divisions and the 20th Mixed Brigade. Under the command of the 11th Army Commander Guan Zhongma and Ichiro, they attempted to carry out a joint attack on Shanggao, attack and weaken the Fruit Army.

In order to deal with the Japanese attack, General Luo, deputy commander-in-chief of the 9th War Zone and commander-in-chief of the 19th Army, assembled about 11 divisions to participate in the counterattack operation, and the haze of the war enveloped the mountain city.

In the headquarters of the Military Command, Wu Chunyang quickly sorted out the documents, put on a windbreaker that was already a bit old but still neat, and quickly walked out of the office.

The sky outside was a little gloomy, as if it would rain at any time. Wu Chunyang's mood was as heavy as the weather, and he said nothing while taking the bus to the post office.

The cases solved by the Military Commission in the past either have clear goals or have cases that have been reported, and they can just arrest people according to the clues.

But this time it was different. They only knew that Yuan Chuyu was missing and was related to the spy case, and they knew nothing about the others.

This feeling of losing control of the case made Wu Chunyang very uncomfortable. He kept urging the driver to speed up, and his irritability was beyond words.

Forty minutes later, the car stopped in front of the post office. The spies had already surrounded the post office and greeted him when they saw him.

Wu Chunyang was not in the mood to greet him, so he immediately called the person in charge of the scene and asked anxiously: "Where are you witnesses of Yuan Chuyu?"

The person in charge of the scene pointed to a peddler who was ruthless and replied respectfully: "The report director is him. On the day Yuan Chuyu disappeared, he bought a pack of melon seeds from the other party, and the two had an argument over the price."

Wu Chunyang was puzzled. There was a roasted shop at the entrance of Central University. Why did he come here to buy melon seeds if he wanted to stay close and far away?

Moreover, according to the previous investigation, Yuan Chuyu has a gentle personality and has never been popular with anyone. Why did he have an argument with a vendor?

After thinking about it, Wu Chunyang decided to ask about the situation first, so he waved to the vendor and called the man in front of him.

"Hello, sir." The vendor took off his hat and bowed deeply.

Wu Chunyang looked cold and said angrily: "Don't talk nonsense, what did that student tell you?"

"Okay, OK." The vendor nodded like pounding garlic and replied quickly: "That guy bought half a pound of melon seeds, and he insisted on saying that my scale is not accurate. Tell me, a person who runs a roasting stall, can I make trouble on the scale?"

Speaking of this, the hawker's expression was very aggrieved, as if he had suffered a great insult.

"Then have you moved or not?"

Wu Chunyang looked at the person with a smile, asked slowly, and lifted up the corner of his clothes to reveal the gun around his waist.

"this........"

The vendor laughed dryly, lowered his head and stopped talking, obviously the P stocks were not clean.

Too lazy to talk to such a profiteer, Wu Chunyang asked him to repeat the situation that day, especially Yuan Chuyu's actions. After saying that, he patted the gun again.

Looking at the dark pistol, the vendor swallowed, not daring to talk about it anymore, and stuttered: "The boy's voice was very loud during the quarrel. I was afraid that the patrol officer would charge less money. After paying the money, he sent a letter into the mailbox and left."

"Remember the time?"

"Remember, after five o'clock."

At this time, the spy leader in charge of the scene also whispered: "Director, I asked the post office. The postbox was collected every day, and the letters sent to the target have been sent away.

Since ordinary civilian letters are not recorded and cannot be traced directly, the brothers are asking the deliveryman to see if they can find clues, but there is little hope."

Wu Chunyang turned around and looked at the mailbox not far away, then looked at the roasted stall again, and there was already some guess in his mind.

Yuan Chuyu was probably quarreling with a small vendor on purpose. The purpose was to enhance the memory of witnesses, thus leaving behind his own activity trajectory and direct investigators to the letter.

If nothing unexpected happens, the letter must have written the reason for Yuan Chuyu's disappearance and clues about the suspect.

This top student in the mathematics department should have noticed the danger and wanted to set up insurance for himself.

——If the meeting with the mysterious man goes well, he will take back the letter. Otherwise, the investigators can find the suspect through the letter.

But the other party never expected that the Shancheng Police Station did not take this matter seriously at all, wasting the best time for investigation and wasting his careful planning.

Therefore, Yuan Chuyu is likely to send the letter to school, home or other places where he often goes, because only in this way can he ensure that the letter is received or the letter is recycled as soon as possible.

Someone has to be sent to monitor Central University and Yuan Zhai. The suspect may also know about this. A student cannot keep the secret in the hands of professional intelligence personnel.

So can you check the letters through the address? The answer is no, because the workload is too high, and it is easy to alarm the enemy.

Wu Chunyang thought it clearly and was about to order a comprehensive monitoring of the Central University and Yuan Zhai to investigate the places where the targets often entered and left, but a small spy walked quickly to report in a low voice.

"Director, the news from the second department is that the target is the Bank of Communications with a deposit of 20,000 US dollars. The suspect will withdraw money at any time. Director Song hopes that we will send someone to stay."

Wu Chunyang frowned, and after a little thought, he said, "One-third of the people were separated to stare at him. If you find the suspect, don't act rashly, find a way to find the other party's place."

"Yes!" The spies replied in unison.

Hearing the reply from his subordinates, Wu Chunyang said again: "The rest of them immediately block the school and Yuan's house, and the places where the targets often appear cannot be spared.

The city's communication will take at least three to four days to deliver, which means that the letters sent by Yuan Chuyu are still on the way to mail, so everyone must be patient when they are punctual.

(ps: It took five days to send a letter to a friend around 2000)

Remember, if you find a letter or a suspicious person, don’t do it either. I want the information network behind the suspect. If anyone breaks the matter, you will know the rules of the family.”

According to the military discipline, losers will face severe punishment, including but not limited to expulsion, imprisonment, and even executions.

As the order was issued, the small spies acted quickly and went to various target locations to set up controls. A large net slowly spread out in the mountain city.

Wu Chunyang returned to the car and thought silently. Yuan Chuyu was just a student, how could he earn 20,000 US dollars.

Selling information?

No one in the Yuan family works in military and political institutions and cannot access sensitive information unless Yuan Chuyu obtained some information about the Central University National Defense Project, it seems that this clue cannot be given up.

Outside the car window, the drizzle began to fall, and a slight sound hit the car window made. The car Wu Chunyang was riding in disappeared into the rain in an instant.

Yuan’s house.

Yuan’s father Yuan Hansen and Yuan’s mother Lu Wan sat on the sofa in the living room. The two looked at the little spy who kept searching for items, with a sad expression.

Although the spies did not say it clearly, they knew that their son must have caused a big disaster, otherwise the Military Control Commission would not have sent so many people to the door. Even if his son could come back, he would probably be imprisoned.

In the corner of the wall, Wu Chunyang stood beside the flower and poked the leaves of the bonsai with his hand, then turned around and looked at Yuan Hansen and his wife with his hands behind his back.

"Mr. Yuan, do you have any abnormal actions when you are at home? Please rest assured that as long as you cooperate with our investigation, Mr. Yuan will be able to return home safely soon."

He did not express Zuo Chong's speculation about Yuan Chuyu's death. At this point, Yuan Chuyu's life and death are no longer important.

The Republic of China did lack talents who received higher education, but compared with intelligence security, a student's life and death is insignificant. It is a bit cruel to say that, but that's the truth.

Yuan Hansen's expression changed and he didn't believe the spy's explanation at all. So what if he didn't believe it? If he wanted to find his son, he had to cooperate with the other party.

Realizing this, Yuan Hansen clenched his fists into fists, and slowly spoke after looking at Lu Wan, who was worried.

"Sir, Chu Yu stays in his room almost always when he is at home. He occasionally goes out to meet his childhood friends. If you don't believe it, you can ask the servants at home."

"Hahaha, Mr. Yuan, don't be excited, I just do my best."

Wu Chunyang pressed his hand and comforted him with a fake smile. His eyes took the opportunity to sweep over Yuan’s mother. Seeing that the other party’s expression was normal, he believed Yuan’s father’s statement at the moment.

Let someone "protect" Yuan Hansen and Lu Wan. He slowly walked into Yuan Chuyu's room and carefully looked at the layout and furnishings in the room.

Unlike other cities, the mountain city has a rugged terrain and many houses are not built according to the north and south. This is the case with Yuan’s house. Yuan Chuyu’s bedroom faces east and west.

In the spacious house, a single bed is against the north wall, and the south wall opposite is placed in sequence with bookshelf, wardrobe, and the east wall is a washbasin rack. There is a desk in front of the window with the best lighting in the west wall.

Most of these furniture are made of solid wood, with bright paint as new, and the style is also a popular style in recent years, which indirectly proves that the Yuan family is well-off.

Wu Chunyang took two steps to the bookshelf. The six-story bookshelf was filled with books. The technicians had checked it before, but they did not find sensitive publications inside.

Besides, even if there are underground books in these books, it doesn't matter to Wu Chunyang. What he cares about is the radio on the top floor of the bookshelf.

In the early on-site survey records, many information such as the origin, brand and other information of the radio were clearly registered.

This is a German-made Telefenggen brand high-power radio with 8 electronic tubes, with a large signal reception range, strong signal, clear sound quality and reliable performance.

According to the wartime radio control regulations, the Yuan family was not qualified to purchase high-end radios of this level. However, the Central University issued a certificate for Yuan Chuyu, proving that the radio was used for scientific research, and the police station approved it.

Wu Chunyang turned on the power supply casually. After a few rustling sounds, a female voice speaking Red Russian appeared on the speaker, which sounded like a civilian radio in some place of Red Russian.

This is why the government controls high-power radios. If you listen to too much news about aliens, it will inevitably lead to dangerous ideas.

Turning off the power, Wu Chunyang turned around and was about to leave. His eyes accidentally glanced at the bottom of the radio and his body paused.

In the dim light, from the side, the originally smooth bookshelves are covered with slight scratches, which are difficult to find without careful observation, and there are no such traces on other places on the bookshelf on the same floor.
Chapter completed!