The lord of the city will defend the city, and must be cautious to inquire about the fathers, officials, and doctors in the city, as well as those who have mutual grudges and cannot be eliminated, summon both of them, explain the reason and interests, eliminate the previous suspicions, and unite with the outside world; At the same time, the city keeper will make sure that their names are written down and that they are not allowed to live together or work together. If a personal vendetta obstructs the official duties of defending the city, the parents, wives, and children are all killed. Those who are inside the city but give advice to the enemy outside the city will destroy the three tribes. And to those who have discovered in advance or who have caught a sinner and reported it, he shall be rewarded with a city of the same size, and the lord of the city shall confer upon him an official seal, and shall give him a prestigious office, and shall make it known to the people, and shall constantly summon those who have made extensive acquaintances with the princes, so that the superior officials may know them, and shall keep them in good condition, and the magistrate shall arrange for them to have feasts at regular times, so that they shall not enter or leave without permission, and shall take them hostage. The elders, fathers, relatives, wives and children of the heroes in the townships and towns must be respected and cared for. If they are poor and have difficulty in making ends meet, the rulers are to give them something to eat. For the parents, relatives, wives, and children of the warriors, they should always be given wine and meat, and they should be honored, and their lodging should be arranged close to the headquarters of the lord and the commander of the city. The official office building of the city commander is condescendingly facing the house where the hostages live, and it must be carefully defended, and the building must be densely covered with mud, so that the upper floor of the department can see the downstairs of the office clearly, but the downstairs of the department cannot see the upper floor, and it is not known whether there is anyone upstairs.

People around the city lord: The officials who work next to the lord must be upright, honest, loyal, reliable, honest and selfless, and capable of taking on affairs. Do not restrict their food, drink, meat, and money, cloth, and other belongings to keep them separately, and beware of theft. The wall of the Bao Palace must be repaired three times, and the guards on the outer wall of the wall should pile up broken tiles and pots and other things. There is a competent official at the city gate, who is responsible for the gate and the door of the alley, and the unlocking and locking must have the certificate given by the city guard. The guards of the palace must choose loyal guards to serve as guards, and the officials must also choose loyal, reliable, fair, and competent people.

Officials of the rank of commander and general are to guard themselves, and the official office and residence are to be surrounded by a ten-foot high wall, and the gate and the boudoir are to be guarded, and the guards are to guard the Sima Gate together.

The place where the sorcerer who occupies the auspicious fortune must live must be close to the residence of the lord of the castle, and the sorcerer must live close to the shrine, and the gods must be respected as gods. They must tell the people of the city what they have said, and report the actual situation of the possession to the city defenders, so that the city guards will know about it. If the sorcerers and soothsayers make up unlucky words that terrify the people, they will be killed.

When it is estimated that there is a shortage of food, the people themselves are asked to estimate the amount of grain that can be paid for military rations, set a date for payment, register the accounts, and the officials pay the money and goods of a comparable price. If the deadline has passed, it will not be paid. Or before all the food is paid, officials and soldiers will be sent to secretly search, and if it is found that the hidden food is not paid, the person will be convicted. If there is a person who can make a report, the government will reward three-tenths of the stored grain. The corn, cloth, money, and livestock that had been requisitioned were to be fairly valued, and a certificate of expropriation was issued to the owner, and the amount and value of the levy were clearly written, and after the war was over, they were to be repaid twice the original value. Those who want to be officials can also give them to officials according to the price and quantity of the property at the time of application; Those who do not want to be officials may also be allowed to accept knighthoods or ransom their relatives or friends who have committed crimes. Those who have received the reward, let them enter the palace to be received, show the love of their cronies, and donate the goods that can pay the levy to help the rulers, and they will be given double the gifts. The format of the payment slip is as follows: a person in a certain county has two people in his family and has accumulated 600 quintals of corn; Or a certain person has a population of ten and accumulates 100 quintals of corn. There is a definite date for the payment of corn property, and if it is not paid after the expiration date, it will be confiscated to the prince. Anyone who knows that he has concealed the truth and does not report it to the government will be rewarded with three-tenths of the hidden grain that is found. It is necessary to be cautious and cautious, not to let the people find out how much food our army has stored, so as to avoid the leakage of military information or the fluctuation of people's morale at a critical juncture that will affect the defense of the city.

As soon as the city keeper enters the city, he will start selecting detectives. If you find someone to act as a detective, you will take him to the palace and raise him, but you must not let him know the facilities and equipment of our guards. The detectives were to live in isolation from each other, and their parents, wives, and children were to live with them, and they were to be given clothing, food, wine, and meat, and they were to be well entertained. The detective returns to be questioned. The house of the lord of the city guard has three floors, and the four corners of the outer wall are built, and the inner wall is also built, and the building is connected with the Bao Palace, and the building is built up and down the double road one zhang and five feet. Bao Gong does not build an inner room. Every three days, mats and mats are distributed, and the thatch is roughly inspected, and the thatch is spread in the palace and is more than three feet thick. To send a detective out of the city, you must send a faithful and reliable person in the township, and there must be parents, wives and children in the family. The detective has to be supplied with enough money when he goes out of town. Be sure to send detectives repeatedly and arrange to provide for their families. For detectives, they should live in isolation, do not share a house with everyone, and provide them with good food. Detectives sent elsewhere must be given the same amount of money and goods as the previous detective. When the detectives returned, they checked the information provided by the two before and after, and if it was credible, they were to be rewarded generously. If the information obtained is credible and there are no discrepancies in the three reconnaissance dispatches, he is to be rewarded heavily. Those who do not want to be rewarded but are willing to become officials will be given the rank of 200 stones, and the lord of the castle will give them the official seal. Those who do not want to be officials but are willing to be rewarded, the lord is the same as before. If he is able to go deep into the enemy's capital to investigate information, if it is indeed credible, the reward for the detective shall be doubled, and if he is willing to be an official instead of receiving the reward, he shall be given the rank of three hundred stones. For those warriors who have done great service in defending the city, the lord of the castle will be sure to personally deliver the reward to the place where the warrior's parents live, so that they can see the grace of the lord to him. For those who rededicate their reward to the auxiliary governor of the state, the amount of reward, knighthood, or atonement for sinners is doubled.

Alerts should be sent, but not more than ten miles away, and signs should be erected in higher and more convenient places, and three men should be placed to guard them. From the farthest place to the city, a total of three signs were erected, and the beacon fire in the same city was far away. Smoke is burned during the day and fires are lit at night. After ascertaining the direction and time of the enemy's coming, they carefully analyzed whether the situation between the enemy and us was combatable, and if they considered that the city was too small to hold the main communication routes, they had to escort all the elderly, children, corn, and livestock into the city. Do not send more than 50 guards at a time. When the enemy attacked the short wall of the outer city, the vigilantes immediately withdrew into the city and did not stay outside the city. The total number of guards did not have to exceed three hundred, and they were sent out of the city when it was dark and put on the military badge. Men are to be sent to the roads and important checkpoints frequented by pedestrians to inspect the trails left on the road, and each person should set up a sign to report the situation to the city, and the city will respond accordingly to them. The guards who went out of the city to reconnoiter reported the situation to the city with markers, and the guards in the city sat inside and outside the Guomen, and also set up liaison markers, ordering the soldiers to be half inside the Guomen and half outside the Guomen, so that the enemy could not know the number of people. As soon as there was an emergency military situation and the enemy soldiers crossed the field, the city commanded the vigilantes with the banner, beat the drums, set the flag, and prepare for battle, and everything acted according to the command of the city. If you can see the enemy, you will light a pile of beacon smoke; When the enemy enters our realm, they light two piles of beacon smoke; When the enemy approached the outer city, light three piles of beacon smoke; As soon as the enemy enters the outer city, four piles of beacon smoke are lit; The enemy approached the great city wall, where five piles of beacon smoke were pointed. At night, beacons are lit, and the number of beacons to report the enemy is the same as the beacon smoke.

Within a hundred paces of the outer city, all walls and trees, large and small, were demolished or cut down. The wells outside the city were to be filled in so that the enemy could not draw water. All the empty houses outside the city were torn down and the trees were cut down. Everything that could be used for siege was brought into the city and was registered. After the battle is over, they will receive each of them according to the amount recorded. The official should send them a receipt with a clear number of pieces. The timber of the road, which could not be brought into the city, was burned on the spot so that it would not fall into the hands of the enemy for his use.

Everyone has to write their name and post it at the office. The officials announced the rules of punishment: Whoever indulges in sexual immorality shall shoot an arrow through his ear; He bullied decent people unreasonably, made a lot of noise, deliberately obstructed passers-by on the road, procrastinated in assigning work, did not go to work on time, did not ask for leave, and shot arrows through his ears. It is a capital sin to cry out and worry about the people. does not admonish the officials but criticizes them behind their backs, arbitrarily makes unfavorable remarks, and deserves to be killed for their crimes. In the army, it is forbidden to play music and chess, and those who violate the order are punished with arrows piercing the ears. Without an order from above, it is forbidden to run in a car, and if a crime is committed, an arrow is pierced through the ear. The offender was convicted of piercing the ear with an arrow. It is also forbidden to indulge cattle and horses, and offenders are convicted of piercing the ears with arrows. Those who do not eat and drink on time shall be sentenced to pierce their ears with arrows, and they are not allowed to sing or cry in the army, and they shall be sentenced to pierce their ears with arrows if they violate the order. Officials at all levels were ordered to earnestly enforce the rules and regulations of punishment, and to kill all those who should be killed, but not punished if they were guilty, and to punish them together with criminals. If you let the criminals escape, kill the person who let the criminals go. All generals who could not make their soldiers fight according to the regulations were to be beheaded. If the officials did not make the soldiers and the people aware of the prohibitions in the army, if anyone broke the law, the officials would confess the crime on their behalf. Anyone who is beheaded in the street for a crime is to be displayed for three days.

Arrange two rows of soldiers to guard outside the gate of the city commander, let them sit with the door between them, and take turns in the morning and evening meals, and there can be no vacancies. The gatekeeper should have a leader, and the lord of the city should always send him to check on the fleeing soldiers, so as to urge the captain and the officer, and report the names of those who have fled, and arrange for four soldiers to sit in the gate of the lord of the city on both sides, and two people to sit outside the gate, and if someone comes to see the commander, the guards should immediately take up their arms and go forward to investigate. Replace them at dinner in the morning and evening, and report the names of the guards.

As soon as they saw the arrival of chariots and cavalry from outside the road, as well as the abnormal situation in the city, they immediately reported it to the lord general, and the lord of the city guard would wait for the report of the observers on the city gate and the county officials to check each other and understand the situation. The Lord will send the people downstairs to the Lord the words of the observer upstairs to the Lord himself.

The attendants who are responsible for passing the message to the main general of the city are called 'Zhong Juan', and there are two of them in Zhong Juan, who sit in the middle of the door, usually close the door, and rotate in the morning and evening when the meal is opened. There must be an older man in the middle of the trickle.

The avenue surrounding the palace of the lord of the city shall be built with a sandwich road, and walls shall be built on both sides, and the walls shall be one zhang high; Set up an observation station, but not like a chicken, in order to keep a watchful eye on the house, and every letter or document received must be carefully checked against other information, and if there is any irregularity with military law, it must be questioned or corrected. There should be high-rise buildings in the sandwich roads, roads outside the walls, and streets, and they should stand condescendingly in the city alleys. Upstairs there is a drum and a stove, and if there is an accident, the drum is beaten, and it does not stop until the officials arrive. At night, the location of the accident is indicated by the light of the fire.

A toilet was built every fifty steps under the city, and a thatched pit was shared between the upper and lower toilets, and all those who were at fault but did not have to be killed were arranged to clean it as punishment. ”

After some explanation, he asked, "The enemy is outnumbered and brave, arrogant and powerful, and intimidates the defenders; Wood and earth and stone are used together, and the earth mountain called 'Yangkun' is built, and the earth and stones are piled up to build a high platform, which constitutes a condescending situation for us, and the enemy soldiers use the big shield as a cover to storm down from the high platform, and suddenly approach our city, and the swords and arrows are on the ground, how to deal with it at this time? ”

Mozi replied, "Are you asking about the defensive method against the attack of the 'sheep mound'?" This siege method is a stupid method of attacking, which will only lead to the fatigue of the soldiers of the attacking side, and is not enough to constitute a danger to the defending side. The enemy attacks with a sheep's mound, and the long-range attack will deal with it with a long-range attack, and the close-range attack will use the method of close attack to fight it, which will not cause harm to the defending side. Arrows and stones were fired at a rapid rate from the left and right west, followed by the stones. Encourage the elite soldiers, be cautious and do not have any worries, the soldiers who defend the city respect those who repel the enemy, and the soldiers who attack the enemy despise those who leave the combat post, cultivate the high morale of the soldiers, strengthen the people's morale a hundredfold, and reward the more the enemy catches, so that the soldiers will not slack off.

If the enemy soldiers continue to build mounds of earth to create high platforms to climb the city wall, and cannot be effectively blocked, and suddenly approach our city, then we will use the method of defending the city ladder to attack the city. For the enemy to fill the moat, rush the car to attack the city, the ladder to climb the city and build the city is not high enough or the time is too late, use wood to increase the height and reinforcement, the size of the wooden coffin is 100 steps on the left and 100 steps on the right. Attacking the enemy with bows and arrows, stones, sand, and ash as frequently as raindrops, and aiding the battle with torches and boiling water, and then selecting and motivating the soldiers, and strengthening their spirits, be careful not to make the soldiers worry. Rewards and punishments should be clearly distinguished, and calmness should be the first priority, but decisions must be made immediately to prevent accidents. Cultivate high morale, strengthen the people's morale a hundredfold, capture more prisoners and give more rewards, and soldiers will not slack off. Punches, high-pitchers, and ladders can all hit them with a punch.

The canal pillar is one zhang and five feet long, buried three feet in the ground, and the upper end is one zhang and two feet long. The width of the canal is one zhang and six feet, the length of the ladder is one zhang and two feet, and the drooping part of the canal is four feet. When erecting the ditch, do not lean against the wall, but stay five inches away; The ladder ditch is ten zhang and one ladder, the canal and the thorn are about one mile and two hundred and fifty-eight steps, and the ditch and the thorn are a total of one hundred and twenty-nine bodies. Various traffic intersections outside the city, you can build a fortress to block the enemy, you can build three lookout pavilions in the most critical places, the position of the three pavilions forms a triangle according to the three stars of the weaver girl, so that the three pavilions can rescue each other. In all kinds of large earth mountains, mountains and forests, river ravines, hills and fields, city gates and key roads, you can build fortresses and erect signs, so as to understand the enemy's situation, and infer the number of people who come and go and the place where the enemy soldiers are ambushed according to the traces left by the enemy.

The evacuated people were allowed to live with their brothers and friends, and all the goods that could help the defense of the city, such as food and livestock, were sent into the city, and if the situation was urgent, they were piled up in the city gates. All the grain, cloth, money, cattle, horses, and livestock paid by the people should be fairly priced, and receipts should be given to write down the value of the quantity.