Too many female prisoners, a special forces soldier transmigrates and marries wildly.

Without further hesitation, Lin Feng moved with lightning speed, flashing out of the study. He whispered to the guards on night duty in the corridor, "Follow me! To the west courtyard! Don't make a sound!"

He led four bodyguards and silently passed through the rain to the west courtyard.

The guards at the gate looked surprised and suspicious when they saw the garrison commander arrive in person. They were about to bow when Lin Feng stopped them with a gesture.

He pointed to the window of the side room and made a gesture to surround it. The guards understood and immediately dispersed, blocking the front and back exits of the side room.

Lin Feng himself pressed himself against the window like a raccoon, holding his breath and listening intently.

Inside the room, extremely low voices could be heard, from a man and a woman.

The female voice belonged to Xie Wanqing, filled with suppressed excitement and disbelief: "...Is it really you? How did you get in? There were guards outside..."

The man's voice was deep and hoarse, and he spoke quickly: "Miss, please don't be alarmed, I have a plan. Time is short, so let's get straight to the point. Do you still have the things your master entrusted to you on his deathbed?"

"Yes. My father instructed me to personally hand it over to the Prince. But I..."

"The Prince's whereabouts have been arranged elsewhere, Miss, there is no need to search for him anymore. Iron Wall City is in imminent danger, and Di Rong and Feng Kun are colluding with him, their ambitions are not small. Before his death, the Master instructed that in case of danger, one could use the 'Earth Listening' command to contact 'Hidden Abyss'."

The Abyss? Lin Feng's heart skipped a beat. That's it! "Earth Listener" might just be part of a much larger organization!

"Qianyuan... Father never told me this clearly. What exactly is this 'Earth Listening' command? Last night outside the city..." Xie Wanqing asked anxiously.

"Last night, it was the 'Earth Listening' Guard who took action, activating the 'Yin Fire' of the mine to halt the enemy's attack. However, this was a last resort, and the disturbance was too great, which may have already attracted the attention of many parties," the male voice said quickly.

"The 'Dark Abyss' was secretly established by His Highness Prince Jing in his early years, specializing in exploring mountains, rivers, geography, mineral deposits, water veins, and even changes in the earth's energy. Its original purpose was to secure the country and its people, and to store up the nation's resources. 'Earth Listening' is its intelligence network. Feng Kun wanted to seize its secrets. It was because of this secret that you, sir, met with misfortune."

"So that's how it is!" Lin Feng suddenly understood.

Prince Jing possessed the core secrets of the northern border's mineral resources and geomantic secrets. Feng Kun colluded with the powerful eunuch Li Song in court, attempting to seize these secrets for personal gain or to aid the enemy. Xie Jingran died protecting these secrets. "Qianyuan" or "Diting" were the hidden forces left behind by Prince Jing to safeguard these secrets.

"Then what should I do now? What about Commander Lin...?" Xie Wanqing's voice was filled with confusion.

"Lin Feng is someone we can entrust with our duties. Iron Wall City can't hold up on its own. 'Hidden Abyss' can secretly help him defend the city, but Miss, you need to find a way to gain Lin Feng's trust, at least... make him understand that we are no match for him." The male voice spoke earnestly.

"I understand. But Commander Lin is very suspicious of me..."

"It's alright. I'll make a little noise to distract the guards. Miss, you can take the opportunity to place this item in a conspicuous place on the windowsill." The rustling sound seemed to indicate that something was being handed over.

"This is a simplified map of some mineral veins and geothermal nodes in the Northern Territory. Miss, you can tell Lin Feng that this is a gift from 'Hidden Abyss,' a gesture of goodwill, and that they are willing to secretly assist him in defending against their enemies. But remember, only say that it was sent by an old friend of our fathers. As for contact... we will not show ourselves unless it is a matter of life and death. Take care, Miss!"

As soon as he finished speaking, Lin Feng heard a very faint sound of clothes rustling in the air from inside the room, as if the man was trying to escape through the back window.

We can't wait any longer!

"Attack!" Lin Feng shouted, kicking open the door and rushing inside.

Inside the room, the oil lamp cast a dim yellow light. Xie Wanqing stood by the bed, holding a small roll of parchment in her hand, her face filled with astonishment.

The back window was wide open, and through the rain outside, a dark figure was about to leap up.

"Where do you think you're going!" Lin Feng's sword was drawn, scabbard still attached, aimed at the back of the dark figure! At the same time, the guards outside the door also rushed in.

Hearing the ominous wind behind him, the dark figure twisted its body strangely, narrowly avoiding Lin Feng's attack. It then hurled three icy stars at Lin Feng's face, chest, and abdomen! The speed was as fast as lightning!

Lin Feng remained calm in the face of danger. He brandished his scabbard, deflecting two hidden weapons aimed at his face and chest with two clangs, while simultaneously dodging one aimed at his lower abdomen.

In that brief moment of delay, the dark figure darted out of the back window like a ghost and disappeared into the rainy night.

"Chase!" Lin Feng shouted, and one of his personal guards immediately jumped out of the window to give chase.

Lin Feng turned around, his gaze sharp as lightning, and shot towards Xie Wanqing, who was pale-faced by the bedside, and the roll of paper in her hand.

"Miss Xie, could you please explain who that person was?"

Xie Wanqing looked at the door that had been kicked open, Lin Feng and his personal guards, then at the parchment in her hand. The astonishment on her face gradually turned into a complex sense of relief.

She slowly exhaled, placed the parchment on the table, and her voice returned to calm: "It was sent by an old friend of my father."

She pointed to the parchment, "This was left by him, saying that it might help the soldiers defend the city."

Lin Feng stepped forward, picked up the parchment, and unfolded it. The parchment outlined the mountains and terrain within a hundred miles of Iron Wall City with simple lines, marked with several red dots, and had small annotations next to it: "The earth's energy is unstable and prone to collapse," "Yin fire accumulates, be careful when approaching," "Underground rivers flow, which can be used," and so on.

This is indeed a crucial map of potential dangers and resources related to the earth's veins.

"An old friend of my father's?" Lin Feng stared at her. "Someone from 'Qianyuan'?"

Xie Wanqing was shocked, her eyes flashing with horror. She hadn't expected Lin Feng to have heard the words "Qianyuan".

She smiled bitterly, "So, sir... you heard everything. I went north for two reasons: first, to find the prince and deliver his belongings; and second, to find out the truth about my father's murder. What happened outside the city last night was indeed the work of the 'Earth Listening' guards of 'Hidden Abyss,' who are experts in the earth's veins. Their intention was to relieve the siege, and also... to show sir that 'Hidden Abyss' is absolutely not on the same side as Di Rong and Feng Kun."

Lin Feng looked into her open and earnest eyes, which seemed genuine. The fact that the ground had collapsed last night and they had been saved was undeniable; now, she had delivered this geomantic map that could aid in defense—her sincerity was evident.

However, this organization is too mysterious. Is its true purpose really just "to secure the borders and keep the people safe"?

With a formidable enemy at hand, it seems we have no choice but to accept this "kindness" for the time being.

"I will accept this map. I will remember 'Qianyuan's' assistance." Lin Feng put the scroll away.

"The Abyss...does it have any other help?"