Hum? How could he have seen it? Wasn’t the first contour topographic map drawn by Dupontrell of France in 1791? Later, Qiu Pin Trierm used contour lines to represent the landforms of the French field; from the late 18th century to the early 19th century, contour lines gradually began to be used in surveying and mapping topographic maps; in the second half of the 19th century, the contour method broke through the obstacles that were difficult to identify and gained recognition; Chen Qingzhi lived in the fifth to sixth centuries AD, where did he see it?

"Qingzhi once saw several wooden maps in His Majesty's library, two of which were quite similar to the maps painted by the lord!" Perhaps seeing Li You's doubts, Chen Qingzhi explained.

Li You didn't know that in later generations, the method of drawing mountains with closed curves appeared in the wooden board maps of the late Warring States Period unearthed from Tianshui, and similar cultural relics were unearthed from Mawangdui! Now he could only secretly guess whether other time travelers had visited the plane where Chen Qingzhi was.

While drawing, he checked the terrain he saw along the way with Chen Qingzhi, and explained the uses of scales and contours to him from time to time. Chen Qingzhi nodded from time to time and realized that he had gained a lot.

Early the next morning, the regiment re-launched the road. After the battle formation, the evil young men in Chang'an were renewed. The nervousness and restraint when they first set out became confident after a big victory, and the scatteredness in daily life gradually disappeared. The long team looked much more regular than when they first left Chang'an.

Chen Qingzhi also gained their recognition through this brilliant victory. Whenever he rode his horse by his soldiers, they would always stop and salute respectfully.

"General Chen!" "General Chen!" Hearings were heard everywhere, and Li You were quite happy to see this. A general who was deeply trusted by soldiers would undoubtedly have more room to play!

Of course, Chen Qingzhi would not miss this opportunity. While leading the team forward, he told the sergeant and his commanders in the delegation about the key points of the march and the battle!

The military system of the Han Dynasty inherited the Qin system and developed. From childhood to adulthood, the military positions were corps commanders - Shi Chief - Du Bo - Hundred Generals - Ya Gate General, Cavalry Supervisor, Division Supervisor, etc. - Sima of other departments (Sima of the Army) - Duwei (Caval Chief) - Clerk General - Zhonglang General (Five-staff, left, right, and Hu Ben Zhonglang General) - Pin general - Pin general - Miscellaneous General - Four Battles, Four Towns, Front and Back General, etc.

Five people were appointed as the army, and ten people were appointed as the commander; the commander and the commander were both the grassroots officers, and Li You controlled this army with less than a hundred people by issuing orders to them! And now he handed over this power to Chen Qingzhi.

Chen Qingzhi's command was obviously much higher than Li You, and the speed and order of the team were improved compared to before! So before sunset, he arrived at the scheduled resting place.

Tang Yi's father stopped the team and came to Li You to report, "Empress, the road ahead is difficult, and there is no rest to camp. It's better to spend the night here today and move to the west tomorrow!"

"The deputy envoy is familiar with geography, so you can follow your wishes!" Li You nodded in agreement, watching the delegation members turn over and get off the horse, and start camping in an orderly manner, cutting down plants and trees, boiling water and cooking.

Unless it is absolutely necessary to march along the road, you must drink boiled water. This is also the rule set by Li You. He remembered that the newly born champion Hou Huo Qubing died of illness because he drank unclean water in the Battle of Mobei when he was pursuing the Huns in the future! And it seems that the reason why Huo Qubing got sick was because the Huns buried cattle, sheep and other livestock in the water source!

This primitive biochemical combat method comes from the first traitor in Chinese history who had just confronted Li You. Although I don’t know if the Bank of China has developed this strategy today, Li You doesn’t want to take risks! Moreover, drinking boiled water can also avoid various diseases, insects and unacceptable problems! It is only beneficial to soldiers.

After using meals, he discussed with Tang Yifu, Chen Qingzhi, Pan Feng and others what to pay attention to during the march tomorrow. Li You started his own map drawing work again! The most of the journey I had already finished drawing yesterday, and today I only need some supplements!

So today's work was completed very quickly. While drawing a map, Chen Qingzhi also listened to what tactics should be adopted for the terrain he had just drawn. Unconsciously, the map was completed in more than half an hour.

Li You carefully packed the map, which was the biggest gain of his trip! Even if he arrived at the Great Yuezhi in the future and reached an alliance with the other party, this map would not be important! This would be the best information for the Han army to invade the Western Regions! With these things, I believe that the Han army in the future will definitely lose the regrets of Li Guang's loss of time because of being lost.

After doing all this, Li You knelt down behind several cases, added tea to Chen Qingzhi, and said respectfully, "General Ziyun, please give me some advice!" Now I finally have time to listen to Chen Qingzhi's secret of military strategy of invincible victory. Li You's calm appearance was extremely excited!

"The lord doesn't need so much politeness! Qingzhi learned such a brilliant drawing method from the lord, and it is worth a little reward!" Chen Qingzhi still looked so elegant, and he could not tell that he was a famous general who won every battle. He sat upright and prepared to start telling Li You about his way of using troops.

"Qingzhi thought that there is no need to win in the world! No matter which famous general is opposite the battlefield, what kind of bear and tiger army is led, and what kind of dangerous passes it is occupied! These can allow the enemy to have a greater advantage at most, but it will never be able to cut off all the chances of victory in our army! No matter any enemy, they will reveal flaws, but the flaws exposed by famous generals are less, and they will cover them better; and the flaws revealed by mediocre talents are bigger and more obvious!" This famous general who once captured thirty-two cities in four and a half months, won 47 battles in field battles, swept millions of soldiers, and had almost no casualties under his command.

Then he reached out and dipped his hands in tea and wrote and painted the Xiongnu cavalry on several tables, and explained in detail to Li You the reason for adopting the original strategy, "... Although the enemy is numerous, the valley is small... and disrupting the enemy's arrangement, our army has the opportunity to take advantage of..."

Li You kept nodding when he heard this. At that time, he only felt that Chen Qingzhi won easily, but he did not figure out why he won. Now he heard Chen Qingzhi's explanation like this and felt enlightened.

Suddenly, a heat in his chest became hot, and the sound of the tiger talisman sounded again, "The host has obtained the inheritance of the famous general Chen Qingzhi and obtained the skill: Hawkeye!"
Chapter completed!