```
The cryptographic staff officer came over with the call-sign manual and handed it to Wang Zhong.
Wang Zhong flipped through the manual and asked, "How long can we still use this call-sign?"
To prevent the enemy from catching on to any pattern, the call-sign had to be changed every few days.
The cryptographic staff officer answered, "Two days, we just changed it last night."
Wang Zhong nodded and casually passed the manual to Vasily: "Take care of this, and later you'll also be responsible for the radio."
"I knew it," Vasily said with a resigned expression.
Wang Zhong said to the cryptographic staff officer, "My call-sign is Genghis Khan. Then, I'm off."
He turned and left the headquarters.
General Andre heaved a sigh of relief and sat down with a slump: "Good thing, good thing, I thought he came to execute me."
The chief of staff reassured him, "The higher-ups also know that our retreat wasn't due to a tactical error, but because the enemy deployed a new weapon."
