There is a cave inside the cave, which is tightly guarded.

After Xu He checked his identity and password, Su Haitang also handed over his soldier's ID card. After being repeatedly checked and interrogated, he was released smoothly.

After turning around the winding secret passage, the two finally stopped.

Xu He motioned her to pay attention to the movements of his hands.

"Remember? You can use this secret room in the future. Only you are allowed to enter. It must be kept strictly confidential. Do you understand?"

"yes!"

Su Haitang answered seriously.

Xu He closed the door and motioned for her to open the code lock independently.

No matter this little thing, Su Haitang pressed the password with flying fingers, and the door opened with a sound.

Su Haitang stepped in and looked at the transmitter, her blood began to boil!

She sat over and listened carefully to Xu He's introduction to the specific operations, and quickly got started.

Morse code is not difficult, but the difficulty lies in the encryption during the transmission of radio information.

But this can't help her. Su Haitang agreed with his grandfather in advance on the decryption method. The score of "Reverse War" was combined with the new version of "The Three Character Classic".

Both of these are her "original creations" that have not been released yet, but will be released soon.

The decryption method has become more complicated, which means the security of information transmission and the increase in the difficulty level of writing information.

But Su Haitang didn't care.

With space in hand, she could try to write the encrypted message as many times as she wanted without fear of leakage.

After the first message was sent, Su Haitang turned off the machine with satisfaction and stood up to open the door.

"Have you learned it? Do you want to practice again? Don't worry about dinner. Come to my house to eat when the cafeteria is closed."

Xu He was waiting outside. Seeing her coming out so quickly, he was slightly surprised and suggested kindly.

Su Haitang smiled and shook his head.

"You've been out for a long time. Go back first to avoid attracting attention. It will be the same if you come back tomorrow."

Although the aunt's scarf was powerful enough and the amount of blood on the first day was not too much, Su Haitang still did not dare to delay any longer, for fear that a blood-stained appearance would be very embarrassing.

Xu He also thought of something, his face turned red again, he coughed dryly, checked the door she had closed, and took her out.

"Tomorrow I will bring you here to get familiar with it. If you don't understand anything, just ask. From now on, you have to come here by yourself."

"yes."

Su Haitang agreed.

The two of them were inspected all the way out and even passed the metal detector twice, which was extremely strict.

"Report! Comrade Peng Man is looking outside. He followed you here and hasn't left." The sentry at the outermost station stopped Xu He to report.

"I'll get her away." Xu He's face turned dark, he nodded awkwardly, and hurried out.

Su Haitang was also extremely embarrassed.

Is the sister-in-law following them?

Could it be that she suspected that she had something to do with the battalion commander?

Um, it's really hard to explain that a man and a woman were hiding in a cave when it was dark.

Battalion Commander, please take care.

Su Haitang silently lit some wax for Xu He and asked the sentry with a dry smile: "Is there any other exit?"

She didn't want to be caught. They appeared together and jumped into the Yellow River.

"follow me."

The sentry looked at her sympathetically, led her to turn right, walked about three meters and knocked on the stone wall on the right, three long and two short.

The stone wall quickly opened from the inside, and a person came out.

"Take her through aisle six."

Su Haitang signed and stamped his fingerprints on the book, followed the instructions of the soldiers inside, and moved forward.

Turn right after 500 meters, go down the steps after 300 meters, knock on the door after 420 steps, two long and two short.

The door is opened, you pass the guard post to check in, and continue on to the next section of the journey.

Su Haitang walked very fast and walked out of the last door in less than ten minutes.

"quartermaster."

Su Haitang came out, looked around in surprise, and suddenly smiled.

"Go back."

Zhang Yuqing waved her hand and let her go back to the dormitory.

"Take this registration form back with you. It's not impossible for your class to have more performances in the singing competition, but try to arrange as many comrades to participate. This is not a concert dedicated to one person."

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