The military affairs office of Lin Fei's division came to report quickly, saying that they had obtained some information. The department reporting this time was the Tianshidili Branch under the Military Affairs Office, and they detected changes in the nearby land. This Tianshidilike is a department responsible for meteorological and geographical monitoring suggested by Jingwen Jingwen. They are not only responsible for terrain surveying and mapping, but also responsible for providing sand tables to commanders, and even monitoring meteorological issues. It's better to tell them when it will rain, how much it will rain, and what impact it will have, and they will all analyze it. And we also need to monitor changes in the land, such as changes in terrain, and various land issues. Therefore, their responsibilities are still very important. After all, ancient wars paid great attention to the right time and place. This demand of the right time and place has not been changed until later generations, so Jing Wen also attaches great importance to it. "Commander, we have detected some problems with the land near the city!" said the geographical staff officer. "What's the problem?" Lin Fei asked. The geographical consultant immediately said: "According to Lord Jingwen, we can observe the habits of those animals to judge geographical issues. And we happened to observe that many earthworms were crawling out of the soil nearby, as if something had stimulated them. "So we'll report back right away!" "You mean someone dug a tunnel?" Jing Wen asked immediately. Of course Jingwen knows that earthworms are generally relatively stable, unless they crawl out of the soil after it rains. But it's not raining now, but the earthworms have crawled out, indicating that they have been stimulated. This abnormal change was discovered by these geographical staff, and they paid attention in time, so they came to report immediately. Jing Wen immediately realized that something was wrong underground, so he let the earthworms crawl out. But if anything goes wrong underneath the land, it shouldn't be anything. According to the rules, when earthworms crawl out of the ground, generally except for geological disasters, someone digs tunnels. In other words, an earthquake is preparing to happen. Earthworms will also exhibit some unusual behaviors. But currently Jing Wen doesn't think there will be an earthquake. After all, the Northeast is not an earthquake-prone area. Is it possible that Jing Wen is so unlucky that he encountered an earthquake while fighting? "Earthquakes are not impossible! But ordinary earthquakes are unlikely to cause us losses." Jing Wen speculated. Although ancient houses were backward, they also had an advantage, that is, even if they were damaged during an earthquake, they would rarely kill anyone. The houses in the Tang Dynasty were all made of wood. Even if an earthquake occurred, it would not cause much damage to humans, so Jingwen was not afraid of earthquakes. And as long as it's not a big earthquake, there probably won't be any problem. The city walls will not collapse. "Although the earthquake will not cause any major harm to us, it would be dangerous if it were an earthquake!" Lin Fei said. Jing Wen also nodded and said: "Continue monitoring, take the listening urn and monitor carefully. If there is any news, notify us immediately!" The listening urn is also an ancient method of monitoring. You can use a listening urn to monitor to the ground, and then you can hear the shouting from far away. Once there are a large number of footsteps or the sound of horse hooves, it means that the enemy's army is not far away. And if someone dug a tunnel, it would be easy to tell. Jing Wen had already known about this kind of thing, so he asked these staff officers to use listening urns to monitor it. "Yes!" said the geographical staff officer. Jing Wen already suspected that the Goguryeo people were digging tunnels, which caused the changes in these earthworms. However, Jingwen was very concerned about the behavior of the Goguryeo people. Very disdainful. Because their behavior has already been discovered by Jing Wen, what else can they do? And Jing Wen was also glad that he had created the so-called staff system, which made it impossible for the enemy to hide through any means. And the staff system established by Jingwen. It can conduct speculation and analysis on various aspects of the enemy to ensure that one will not suffer heavy losses from the enemy's various methods. The Goguryeo people had the same fighting methods as those of the Central Plains in the past, and they valued the role of the general. The ability of an army's general often represents the army's combat effectiveness. Moreover, all work is assigned and arranged by the master in the future, and the ordinary division of labor is not appropriate. In those armies, the general suddenly thought of something, and then the whole army immediately revolved around the general. This kind of military management model is actually very extensive and very dangerous. This kind of management model will either result in a big victory or a big defeat. Because of this extensive management, once the general neglects certain areas and is caught by the enemy, a great defeat will be inevitable. Only a small number of prudent generals can make the army as flawless as possible, so that the entire army can be preserved. But Jingwen¡¯s staff system allows various staff officers to carry out actual management on behalf of the general, so that they can make various arrangements, and even if the general does not give orders, they will work proactively and have their own division of labor. This is completely different from the staff of other armies.The staff are just guests of the general. They can only do actual work after the general assigns tasks. Once they are not assigned, they are free. Therefore, the staff system is much better than the staff system, which can ensure that every place is as flawless as possible. Two hours later, the geographical staff officer came over. "Commander, we heard the news. As expected, the Goguryeo people are digging tunnels. If our prediction is correct, their tunnel entrance is behind a small hill not far away." The geographical staff pointed to the distance. A small hill about ten meters high. And Jing Wen smiled when he looked at the small hill. They actually used the small hill to cover Jing Wen and the others from their sight. But eyes can deceive people, but ears cannot deceive people, nor can geological changes deceive people. "Can you figure out where they will end up digging the tunnel?" Jing Wen asked. "Yes, we can quickly calculate the end point of the tunnel." The geographical consultant said. And Lin Fei immediately asked: "Jie Shuai, do you want to take advantage of his scheme?" "Of course, since they come here to beat us, if we don't beat them hard, how can we be worthy of their painstaking efforts! Haha. Haha" Jing Wen laughed and said. Lin Fei felt a pity for the Goguryeo people. Digging tunnels was originally a good method, but when he encountered Jing Wen's staff system, he had nothing to hide. Now that Jing Wen has come and uses his tactics, it will probably be really miserable. (To be continued, please search Piaotian Literature. The novels will be better and updated faster!