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

The door opened, and a guard came in carrying a tea tray. It was a young man named Aji, who had recently been transferred to serve in the study. He was about fifteen or sixteen years old, with a handsome face, quick hands and feet, and usually quiet and reserved.

"Great Commander, it's late. Have a cup of ginseng tea to warm yourself up." Aji placed the tea tray on the corner of the table and stepped aside.

Lin Feng hummed in response, not looking up, still staring at the symbol, and casually asked, "Aji, you're from Longxi, right? Have you ever heard of the legend of the 'Yin-Yang Spring'?"

Aji seemed to stiffen for a moment, then lowered his head and replied, "Reporting to the Grand Commander, I am from Qingshui Town in Longxi. The 'Yin-Yang Spring'... I've heard the old people in town mention it. It's located in Eagle Mountain, fifty li west of the town. There are two springs next to each other, one cold and one hot. The cold one is bone-chilling, and the hot one is scalding. They say it's the eyes of the mountain god. But the mountain road there is dangerous, and there's miasma there. Ordinary people dare not go there."

"Oh? Have you seen it?" Lin Feng picked up the ginseng tea, brought it to his nose and smelled it. It was top-quality old wild ginseng, with no strange smell.

"When I was a child, I went into the mountains with my father to collect herbs. I saw it once from afar, but I didn't dare to get close." Aji's voice was even lower.

Lin Feng nodded, took a sip of tea, put down the teacup, and waved his hand: "Understood, you can go now. Be vigilant at night."

"Yes." Aji bowed, picked up the empty tea tray, and quietly withdrew, closing the door behind him.

The moment the door closed, Lin Feng's eyes turned icy. He put down his teacup, took out a silver needle as thin as a hair from his sleeve, and dipped it into the remaining tea. The silver needle remained bright white and non-toxic.

But Chen Heng hadn't missed the moment Aji stiffened and his slightly rapid breathing when he asked about the "Yin-Yang Spring." Moreover, Aji had only come to the mansion three days prior to replace an old servant who had returned home due to illness; his paperwork was complete, his background impeccable, and Chen Heng had personally verified this. Yet, at this very moment, a young man from Longxi, who happened to know about the "Yin-Yang Spring," came to the study to serve him.

Is it a coincidence? Or...?

He remained calm, but he had already taken Aji to heart. There might be more than one mole, and they might be lurking among him in unexpected ways.

The investigation was carried out covertly the following day.

Meanwhile, Chen Heng was also intensifying his background checks on the officials in the inner court. Aji's file was retrieved again; the guarantor in Qingshui Town and the travel permit were all in order, and there was even a signature from the local village head. However, Chen Heng still secretly dispatched two unfamiliar "Falcon Battalion" experts to Qingshui Town in Longxi under the guise of purchasing medicinal herbs to verify their identities. The round trip would take at least seven or eight days.

In the afternoon, Lin Feng was watching his personal guards drill at the training ground when Lei Bao rushed over, his face grave, and whispered a few words in his ear.

Lin Feng's eyes sharpened, and he immediately returned to his study. Lei Bao brought an urgent report transmitted by the "Night Owl" scout using a carrier hawk.

"A large group of about two hundred people, with carriages and horses, has been spotted in the direction of Yin-Yang Spring. They are moving in an erratic direction and seem to be searching for something. There appear to be people dressed in Western Region attire and martial arts practitioners in the group. Our people dare not get too close, but judging from the skills of their scouts on the perimeter, they are extremely elite and highly vigilant. In addition, a small group of suspicious people has also been spotted in the direction of Ice and Fire Lake. They are acting suspiciously and seem to have some kind of connection with the people in the direction of Yin-Yang Spring, but no direct contact has been found."

"Two hundred men? Western Region attire? Jianghu figures?" These are definitely not ordinary bandits or horse bandits. Lin Wang and Di Huo fled in panic; how could they have gathered two hundred elite troops in such a short time? And they even included Western Region figures and Jianghu masters? Are they from the Golden Hook Sect? Or... is another force involved?

"Earth Vein Inflammation Marrow"... Symbols of "Water and Eye"... Yin-Yang Spring... A large group of mysterious people...

The clues seem to be converging on the "Yin-Yang Spring".

"Lei Bao, you will personally lead a team of elite 'Falcon Battalion' soldiers, change into civilian clothes, and secretly head to the vicinity of 'Yin Yang Spring.' Do not make contact with them; simply monitor them from a distance to ascertain their true number, equipment, purpose, and who their leader is. Pay special attention to whether there are any individuals missing a finger on their left hand, or those using Golden Hook Sect martial arts or hidden weapons."

"Yes, sir! This subordinate will go and prepare immediately!"

Lei Bao accepted the order and left. Lin Feng stood alone before the massive map of the Northern Border, his gaze fixed on the area where Longxi and the Northern Border met. The "Yin Yang Spring" was like an unexpected chess piece, placed amidst the intricate and complex situation.

Is it a trap? Or is it the other party's real target?

"Knock knock." The knocking sounded again.

"Come in."

Aji brought in freshly brewed tea, still with his head bowed and eyes downcast. He gently placed the teacup on the corner of the desk and then prepared to leave.

"Aji," Lin Feng suddenly spoke, his gaze still fixed on the map, "You say you're from Qingshui Town, do you know if there's a shorter, but more difficult, side road from Qingshui Town to 'Yin Yang Spring' besides the main road?"

Aji stiffened again, this time more noticeably. He lowered his head and said, "Reporting to the Grand Commander, there is... a small path used by herb gatherers that crosses the 'Ghost's Sorrow' Cliff, which is about twenty li long, but... but that cliff is dangerous, and people fall to their deaths every year, so no one uses it anymore."

"Ghost's Bane..." Lin Feng nodded, seemingly asking casually, "Alright, you can go now."

Aji felt as if he had been granted a pardon and quickly retreated.

Lin Feng picked up a cup of fresh tea, its aroma wafting through the air. He walked to the window, watching Aji's hurried figure as he crossed the courtyard, his eyes deep in thought.

"Ghost's Bane"... The herb gatherer's path... This boy seems to know quite a lot.

Night fell once more. Ironwall City was unusually quiet under the increased vigilance of both visible and hidden sentries. In Lin Feng's study, the light remained on all night.

Around midnight, a gray owl silently landed on the study window sill, a thin copper tube strapped to its leg. It was a message from "Shadow Fang"!

Lin Feng untied the copper tube and took out the note inside. It contained only a brief coded message, which read: "A hidden camp has been discovered on the side of 'Ice and Fire Lake,' with approximately thirty people. The leader is wearing a black robe that covers his face, and he is missing his little finger on his left hand. There are traces of smelting at the camp, and a small amount of 'Crimson Flame Crystal' ore has been unearthed. Lin Wang and Earth Fire have not been found. 'Shadow Fang' will continue surveillance."

Missing finger! Smelting "Crimson Flame Crystal"!

As expected! After escaping, Di Huo and Lin Wang did not go far away, but instead searched for new and more secretive "Crimson Flame Crystal" mines and attempted to re-refine "Crimson Flame Thunder"!

The "Yin-Yang Spring" and the "Ice and Fire Lake," these two places of "water" and "eye," are probably the key nodes of this plan!

"Chen Heng!" he called out in a deep voice.

"Your subordinate is here!" Chen Heng responded and entered.

"Gather two hundred of the most elite members of the 'Falcon Battalion,' armed with powerful bows and crossbows, and have them accompany me out of the city at dawn tomorrow. Publicly declare it a routine border patrol," Lin Feng ordered. "We're going to meet those 'guests' by the 'Yin-Yang Spring'! Let's see what 'treasure' they're looking for!"

"Yes!" Chen Heng's spirits lifted.