A magazine of 30,000 rounds, you call it Hanyang

The modified level 13 self-propelled mortar tank consumed one Japanese major shoulder badge and one lieutenant colonel shoulder badge.

Zheng Kaixuan still had 260 Japanese epaulettes in his hand, and he planned to exchange them all for artillery shells.

In the battle to rescue the Independent Regiment, Wang Fugui and others consumed a total of 260 artillery shells.

He now only has 400 shells left.

If they really open fire at full power, 400 shells may not be enough for two guns to fire for several minutes.

"System, exchange all epaulettes for Triumph Mortar shells."

Zheng Kaixuan cleared out his epaulettes without hesitation and replaced them all with ammunition.

[Ding, congratulations to the host, you have consumed 260 epaulettes of various levels and obtained a total of 600 Triumphal Mortar shells.]

Zheng Kaixuan nodded with satisfaction.

The independent rescue regiment won a good battle.

Not only did they rescue the independent regiment, but they also earned back all the artillery shells they had consumed. Not only did they not lose money, they even made a profit.

[Ding, congratulations to the host for upgrading the Triumph Self-Propelled Mortar Tank to level 13. The main questline's fourth pistol upgrade feature has been unlocked for the host.]

"Ok?"

Zheng Kaixuan was a little surprised. Once this level 13 weapon appeared, it actually revealed another main quest.

"Why the hell should you have said that earlier!"

Zheng Kaixuan also had a pistol, which was also seized from the Japanese.

Type 14 Nambu pistol, commonly known as the Turtle Box.

In the Japanese army, most lieutenant-level officers, such as squad leaders, deputy squad leaders, and squadron leaders, are basically equipped with turtle box pistols.

However, this type of pistol has a short range and a high jam rate, and is not very easy to use.

Zheng Kaixuan seized dozens of swords, but they were all thrown into the warehouse as garbage and were never used.

A wry smile appeared on his face.

If it was just now, when he still had the epaulettes in his hand, he could have taken out some of them and at least modified some of the pistols to level eleven.

Now all the epaulettes have been used up, so they cannot be modified for the time being.

However, Zheng Kaixuan quickly adjusted his mentality.

After all, a pistol is a melee weapon and is of little use on a battlefield of this scale, so there's no need to rush to modify and upgrade it.

"Equipment support team, move out."

Although it was already night, Zheng Kaixuan had no plans to spend the night in Wei Zhuang.

After he sent a guard to inform Xing Zhiguo, he returned to Heiyunkou with the weapons support team.

"Old Zheng asked me to bring my men back to the battlefield before five in the morning. It seems that Old Zheng is ready to start the action."

Xing Zhiguo, the deputy commander of the independent regiment, was so smart that he understood Zheng Kaixuan's meaning in an instant.

After Zheng Kaixuan brought the equipment support team to the battlefield, he asked them to meet with several company commanders of the Fourth Battalion, and then rushed to the temporary command post located on the hillside of the Heiyunkou Canyon.

In the command center, Wang Xikui was lying on the table, sleeping soundly.

Kong Jie couldn't sleep at all. He paced back and forth in the tent, holding a big pipe.

Seeing Zheng Kaixuan coming back, Kong Jie immediately became excited.

"Old Zheng, you came back suddenly. Are you planning to launch a fucking night raid on the Sakata Unit?"

Zheng Kaixuan shook his head.

"Old Kong, most of our soldiers are new recruits. Fighting at night is too disadvantageous. You should go to bed early."

Kong Jie still couldn't sleep.

"If we all fall asleep, what if that old devil Sakata suddenly starts a fight in the middle of the night?"

Zheng Kaixuan shook his head again.

"If Sakata is sure, he will definitely mobilize the main force to rush here during the day. You can sleep peacefully."

Kong Jie took a few puffs of his pipe.

"Old Zheng, tell me the truth, when are you planning to fight this battle?"

Zheng Kaixuan took out a confiscated pocket watch from his arms and glanced at the time.

"Seven hours later, around five in the morning, Sakata should send someone to launch a surprise attack."

Kong Jie obviously didn't believe what Zheng Kaixuan said.

"Old Zheng, how did you calculate that? Can you determine the time of Sakata's sneak attack?"

Zheng Kaixuan smiled slightly.

"I'm not entirely sure, but I suspect it's about right. Sakata, that old devil, is an expert on China. He must understand that the early morning hours are the best time for a surprise attack."

"He refused to advance during the day. First, he was trying to figure out our strength. Second, he probably wanted us to spend the night in the cold wind. By the time dawn approached, we would be exhausted and drowsy. He believed that a sudden attack would give us a greater chance of success."

Kong Jie looked at Zheng Kaixuan in disbelief.

"Damn it, it's better to have some knowledge. You guys, the top graduates of the Military Academy, are more cunning than Old Li. What if Sakata doesn't come and attack us in the morning?"

Zheng Kaixuan's mouth corners slightly raised.

"If he doesn't come, it proves that he still doesn't understand our Chinese military tactics well enough. Then we can raid his camp, and the chances of success will be very high."

"Lao Kong, go to sleep. Whether the Japanese come or not, we must confront the Sakata Regiment at five o'clock tomorrow morning."

After hearing what Zheng Kaixuan had said, Kong Jie finally felt relieved and fell asleep on the camp bed next to the stove.

Zheng Kaixuan went out again and ordered that only a small number of soldiers be left on guard at each position, and the rest of the soldiers should return to the temporary camp to rest and recover their strength.

Sakata Regiment, the Japanese temporary command post.

The old Japanese soldier Nobutsu Sakata gave a thumbs up to the Japanese Chief of Staff Shun Yoshizawa.

"Ji Zejun, your plan is brilliant, incredibly brilliant! It seems you know more about China than I do. Let's follow your plan."

Yoshizawa Shun stroked his pitifully sparse gray beard, his face full of pride.

They had already found out that the troops defending Heiyunkou were the Fourth Battalion of the New First Regiment.

The first unit to ambush them during the day was the Independent Regiment.

Although the Fourth Battalion has strong combat effectiveness, it has a small number of people. Although the Independent Regiment has a large number of people, its combat effectiveness is not strong.

As long as they spend one night, their fighting capacity will be severely reduced.

"Let alone a mere 4th Battalion of the New 1st Regiment and an independent regiment, even if the main force of their 386th Brigade arrived, facing the pressure of our Sakata Regiment, they would probably have sleepless nights! Hahahaha..."

The Japanese Chief of Staff, Shun Yoshizawa, is very cunning.

When setting up camp at night, he moved the camp forward a few kilometers. Now the Sakata Brigade was only seven or eight kilometers away from Heiyunkou.

With an entire regiment of Japanese invaders in front of them, anyone else would definitely not be able to sleep.

However, this time their opponent was Zheng Kaixuan.

When facing Zheng Kaixuan, the person who can't sleep can't be Zheng Kaixuan, it can only be the old Japanese devil Sakata and his Sakata Regiment.