After the establishment of the Ming Dynasty, in order to strengthen the military system, guards, institutes and forts were set up throughout the country. In the sixth year of Xuande in the Ming Dynasty (1431), Wangyun County was abolished, and Longmen Guard (now Longguan) was set up, which was under the jurisdiction of Xuanfu Town (now Xuanhua). Xuanfu Town is divided into five roads: east, south, west, north and middle, and Longmenwei first belongs to the north road, that is, the monostone road. In the eighteenth year of Wanli (1590), the monolith road was divided into upper, lower and middle roads, and the middle road was governed by Longmenwei, and the middle road staff general also moved from Geyubao to Longmen.

Longmen Wei South Gongjing Division, North Aid Dushi, West Control Zhangyuan, Ming Chen Lin Sheng once made an incisive description of its situation: "Because of the abandonment of Kaiping, Wei moved Dushi, and the outer domain has been withdrawn, so the police of Longmen have increased." Fu Longmen, not him! The leaning of Xuan (Xuanfu Town) is shielded, that is, the leaning of the Beijing division is also shielded. More than 20 miles out of the Longmen guard westward is the world-famous "Suoyang Pass", here is the "Longmen natural insurance", is the traffic artery leading to Zhangjiakou and Xuanhua.

Dushikou (north of Chicheng County, Hebei Province), is an important pass in Xuanfu Town, the Great Wall of the Ming Dynasty, has the name of "the throat of the upper valley, the right arm of the Beijing division", because there is a lonely stone rising from the ground in the southwest of the pass, the pass is named because of this. On the monolith that stands in front of the pass, it is engraved with two groups of big characters of "abrupt and lonely show" and "one stone flying". The monolith city is located between the two rivers that flow from north to south, the left is the Huanglong River, the right is the Qinglong River, the back is the Spider Mountain, so there is the saying of "two dragons playing with pearls", it is famous all over the world at the end of the Yuan Dynasty and the beginning of the Ming Dynasty.

Yu Qian, the secretary of the Ministry of War, has written many times: "The outside of the Dushikou Zhucheng is a border fence, and the inside is the Beijing division barrier, the size of the advance and retreat, and the safety is related!" ”。

…… Dividing line ......

Today's Suoyangguan is as usual, winter has just passed, and the city is bustling and lively. The people of the two ethnic groups came and went, exchanged ideas and supplies, and were anxious to replenish the urgently needed supplies. Merchants shouted hard and enthusiastically promoted. The sun is setting in the west, and when it is evening, the people of the two ethnic groups are "drunk and singing, and forget to return". It is a harmonious scene of peace, stability and prosperity.

After a lively day, everyone rested early and prepared to continue trading tomorrow. There are many caravans that come to Suoyang Pass to do business today, and the inns in the pass are full, and even the firewood house and horse pen are lying down at night. Fan Ming's caravan was crowded with many people and cars, and it was slow and late, so he could only find an open space to set up camp. After all, this is a border place, and it is not surprising that it is common to set up camp on your own.

The moon is bright and the stars are scarce, the night is quiet, and the city is peaceful. In the silence, a dark figure crept out of Fan Ming's camp and sneaked out, looking around vigilantly. Make sure there is no one left or right, "coo-coo-coo-coo......", and the black shadow makes the cries of pimple chickens (stone chickens) (people are asleep, and no one cares why there are pimple chickens in the city. More shadows swished out of the camp. The large number of black shadows seemed to be well planned, and there was no hesitation, and the troops quickly divided into three ways and acted separately. Stealthily moving all the way to the closed door; the other was ambushed on both sides of the road at the entrance of the barracks, either on the house or on the corner; There is also a way, which seems to be an elite, to the residence of the guards of the city.

At the gate of the city, the doorman on duty could no longer bear the sleep, and went back to sleep in the house. The soldiers guarding the city gate were also in high spirits, crouching at the foot of the wall, or dozing off with spears on their pillars, and snoring one after another. A few dark shadows quietly jumped into the house, a few others gently approached the dozing soldiers, and a few quickly jumped up to the city tower, quietly and silently, to solve all the guards of the city gate.

The guards of the city gate were solved, and the black shadow on the city tower gathered all the lanterns and torches on the city tower into four piles, which were high and low in an orderly manner, which seemed to have some meaning. Soon, just like a jackal smelling blood, in the vast night outside the pass, the black shadows of countless people and horses appeared dimly, and pounced towards the pass......

Countless knights dressed as Mongols poured into the city in full armor, and under the guidance of the black shadows, they rushed to the barracks, official offices, and treasury. The people in Guancheng woke up and were in a mess. Due to long-term nutritional deficiencies and severe lack of vitamin A, soldiers in ancient China had night blindness, and they could not see clearly at night, and would only jump around like headless flies.

The officers were assassinated, the defenders had no one to lead, and those who rushed out of the barracks were either killed or wounded by the arrows, guns, and thunderbolts of the ambush soldiers, and the soldiers who were still alive quickly laid down their arms and surrendered. However, a few hot-blooded civil officials in the official office were tough, holding light swords, and led the officials to resist. Unfortunately, a round of fire rang out, and everyone lay in a pool of blood, and then there was no more.

In addition to the resistance in the official office, there were other flesh and blood who fought bravely against the enemy. Helplessly, the poorly armed and unorganized rabble in a hurry could not cause any losses to the army armed to the teeth, but only added a few unjust souls in vain.

Almost at the same time, countless troops, also armed to the teeth, but all dressed as elite cavalry of the Ming army, divided into several routes, murderously pounced on several Mongolian tribes near Suoyang Pass, and launched an indiscriminate massacre of Mongolian herdsmen who were still asleep.

Pingming, the "Mongol army" occupying Suoyang Pass, collected all the collected supplies and vehicles, the young daughters of the killed officials, and the surrendered Ming army, which was very efficient. Then let the captured Ming army either drive the captured cattle and sheep, or drive a vehicle full of supplies and women, or carry a heavy burden, and quickly leave Suoyang Pass. Although a life was spared, the caravan that had been taken captive wanted to cry without tears. Of course, Fan Minh was also mixed in and "wanted to cry without tears", his caravan was also "taken captive", and he also "lost" a lot of "buddies".

The "Ming army" that attacked the Mongol tribes also drove the captured cattle and sheep at this time, and drove a vehicle full of supplies and young women, and quickly left. Everything that was not robbed of the Mongol tribes was burning, leaving the old, the sick, the sick and the dead young and strong men alive.

Everyone did not see that the "Mongol army" that attacked Suoyang Pass and the "Ming army" that attacked the Mongol tribes actually met. After the rendezvous, the impostors quickly withdrew eastward under the cover of the dwarven army.

Hearing the news, the Ming reinforcements who arrived from the Longmen Guards and the Mongolian knights from other tribes who came from the nearby steppe naturally listened to the cries of their respective survivors, convinced that the other side had attacked their side, and immediately launched a retaliatory action against the other party without hesitation.

The revenge was so cruel and tragic that when the officials of Xuanfu and Guihua City arrived, there were already mountains of corpses and rivers of blood flowing inside and outside Suoyang Pass. Although both Xuanfu and Naturalization City remained sane and were suspicious of the flawed appearances they saw, they forcefully suppressed the retaliation of their subordinates. But the middle and lower echelons of the two sides didn't think so much, and insisted that the other party launched the attack first, and after the officials left, they began to kill each other again.

Within a few days, similar things happened one after another in several guards under the Dragon Gate Guard and the Dushi Guard, and the middle and lower echelons of both sides insisted that the other party launched the attack first based on what they saw. Hatred overshadowed reason, and at this time, Xuanfu and Naturalization City could no longer suppress the anger below, and inside and outside the border walls of the Dragon Gate Guard and the Dushi Guard, billowing wolf smoke was burning everywhere, and it quickly spread to the surroundings!