The rural doctor bought a husband who was very treacherous

Qi Lingheng looked at Qi Qin, and Qi Qin nodded at him.

"We are quite close to the people from Northern Frontier. Madam must be worried that if she speaks too loudly, they will hear her."

"Well, let's talk about it." Qi Lingheng took Su Tang's hand and walked to where he had just sat, and Qi Qin quickly followed.

"There seems to be a cave ahead. I heard a loud noise coming from inside before, but it only lasted for a while..." Qi Qin carefully described what she heard and saw.

However, he was in a low place and quite far away, and there was no place to hide, so he didn't find out much information.

Su Tang thought for a moment, then suddenly looked at Qi Lingheng, "Is there a mineral vein here?"

"Never heard of it." Qi Lingheng shook his head.

Then he looked at Marquis Dingbei who was exercising with equipment in the distance and walked over.

"Dad, is there any mineral vein on Xinze Mountain?"

Marquis Dingbei has stayed at the northern border longer than him, so he might know some news.

"Oh, you're here." Dingbei Hou put down the equipment in his hand, stood up and wiped the sweat off his face. "Someone said before that some iron ore stones were picked up, but I also took people there to see, there were only some scattered stones. People dug there for a while, but there was too little iron in the stones, so the place was sealed.

What's the matter? You suddenly ask this, what news did you hear in the city?"

At this time, Marquis Dingbei did not know that Su Tang had brought them to the foot of Xinze Mountain.

"It's okay. Su Tang and I followed a few Northern Xinjiang people to Xinze Mountain. There seemed to be quite a few Northern Xinjiang people stopping there. I don't know what they were doing."

"What could be there? I guess he thought there was iron ore there, just like I did before.

Hehe, then they will definitely give up after digging for a while." Dingbei Hou picked up the water cup beside him and took a sip of water.

"I don't think so." Su Tang also walked over here and said to Dingbei Hou and the others.

"Oh? Why?" Marquis Dingbei asked curiously.

“How deep did you dig?”

Some mines may be buried very deep, which depends on the geological environment of the location of the mine. Dingbei Hou just said that they didn’t dig for long before.

"This should be dug about six or seven hundred feet." It was actually quite a long time ago, when Marquis Dingbei had just arrived at the northern border.

He could only recall a rough number. After all, no iron ore had been dug out at that time, and a lot of manpower was consumed, so he didn't take the incident to heart.

Su Tang intuitively felt that her previous thought was correct. Since iron-containing ores could be picked up at will in the mountains, there must be a mineral vein here.

It may be that Marquis Dingbei dug too shallowly at that time. After all, there was no gunpowder in this era, and mining could only be done by manpower bit by bit. After digging for a few hundred meters without any special gains, he most likely gave up.

Su Tang expressed her thoughts, and when Dingbei Hou heard it, he immediately stood up excitedly.

"Oh, if there really is an iron mine, then I missed it before?"

Qi Lingheng only glanced at Dingbei Hou, then looked at Su Tang, "Those people must have found the iron ore."

Otherwise, why would they go there to dig holes in such cold weather?

As far as he knew, there were no natural caves in Xinze Mountain. Qi Qin said that he saw a cave, which must have been dug later.

"Then let's go and check it out?" Marquis Dingbei became interested.

"Dad, you should think about how to retake these border cities."

According to the information Qi Feng and his team had previously obtained, the garrison commander here should have reached some consensus with the people from the northern border, and many of the soldiers below probably knew about it.

They wanted to identify all these people, and then take back several border cities with the other soldiers who did not participate.

As for those who betrayed Dayong, Qi Lingheng thought that those who should be killed should be killed directly, so as to avoid bringing them back and listening to their excuses.

As for the people from Northern Xinjiang, they only need to keep the important people who came this time so that they can talk to Northern Xinjiang about compensation.

"Hey, haven't I already been thinking about it?" After being told by Qi Lingheng, Marquis Dingbei was clueless and replied with a little grievance.

Qi Lingheng looked at Su Tang and said, "I've rested well. Let's take someone to check it out."

Su Tang nodded and called out the secret guards with the best shooting skills.

Everyone was given an automatic rifle and then left the space.

When they got outside, Su Tang pointed in a direction.

Qi Qin had never gone any higher, so after having been watching for a whole day, she stayed in the space to rest.

Su Tang said that only when people have a good rest can they be energetic and avoid making mistakes.

Su Tang doesn't like those practices that try to exploit others.

Even if those people were secret guards, they were only used as tools in this era.

Therefore, those who were brought into the space were extremely respectful to Su Tang.

After coming out, the armed secret guard ran quickly forward.

Qi Lingheng followed them with Su Tang.

After the group approached those people from Northern Xinjiang and found that there were indeed only people from Northern Xinjiang there, they shot and killed them without hesitation with rifles with silencers.

The man guarding the door must not be an important person. Qi Lingheng had told the secret guards before that they only needed to spare the life of the Northern Frontier leader.

Although the silencer could not completely block the sound of gunfire, the noise here did not attract the attention of the people in the cave.

"Search their belongings." The secret guards hurried forward and did so.

The items that were searched were placed on the ground, and Su Tang put them into the space with a wave of her hand.

The secret guards had already gotten used to what Su Tang did. After putting down their things, they scattered and became alert.

At this time, Su Tang and his friends discovered several horses tied to a nearby wooden stake.

Su Tang walked there and put the horse into the space.

These horses are obviously good horses, especially the black horse that is completely black without a single stray hair and has shiny fur.

"These are all the Ferghana horses from Northern Xinjiang." Qi Lingheng had explained to Su Tang that in the previous years of the truce, people from Northern Xinjiang would occasionally sell horses to Dayong.

But most of them are old horses that they have eliminated, and most of them are not in good condition.

People in northern Xinjiang won’t sell horses like the ones just mentioned.

A few people walked towards the cave again, and Su Tang finally understood why the people inside were not alarmed.

There were "ding-dong-dong" sounds of chiseling and other loud strange noises coming from the entrance of the cave.

It's so noisy inside, how could anyone hear what's happening outside?

This cave, starting from the entrance, has torches inserted at regular intervals.

So Su Tang and the others could see clearly what was happening in the cave.

Several people moved forward, and Su Tang and Qi Lingheng were protected in the middle by the secret guards.

As they went deeper into the cave, the noise inside became louder and louder.

At this time, several figures appeared on the stone wall in front. Those figures were still moving and seemed to be walking towards this side.