Sun Xin is different from his eldest brother, his thinking is much more active, after listening to Huang Jie's explanation and looking back, he suddenly realized, but he still had a question: "Da Lang is right, it is indeed a good thing that this road is widened, but why didn't the imperial court repair it before?" ”

Huang Jie also smiled and said, "Do you know who started cultivating such avenues?" It is the first emperor of Qin, "Hanshu Jiashan Biography" said that Qin Chi Road is in a flat place, the width of the road is 50 steps (about 69 meters today), and a tree is planted every three zhang (about 7 meters today). It is only because the construction of the Chi Road costs the people and money, so the emperors of the past dynasties did not dare to follow suit. ”

Sun Xin smacked his tongue and said, "Hiss! Fifty paces wide? I'm afraid that only the royal street in Bianliang City can be compared. ”

Huang Jie laughed out loud, pointed at Sun Xin, and said, "Second brother hasn't been to Bianliang, right?" The Royal Street is two hundred paces wide and twelve and a half miles long. ”

Sun Xin's face turned a little red when he heard this, but he didn't care too much, and asked, "When I inquired in the city, I heard that Da Lang was going to ...... Four lanes, all the way to Gwangju? ”

Huang Jie nodded, looked at no one on the left and right, and said, "Since the eldest brother and the second brother went to Anqing to act, I have been planning to do something for the changes in the past ten years. In terms of manpower, the big dragon and stone they have not yet built the foundation, and it is not easy to find a young man to train at this time, at least they have to be roughly finished before they can let go. In terms of financial resources, there are financial resources such as canned meat on the surface to hide people's eyes and ears, and secretly there are snow salt and snow sugar to make money, which should be enough in the next five years, and the material resources are covered by your iron mill...... By the way, a few days ago, I took 3,000 yuan and Uncle Sun Qi, and asked him to go to Huangzhou, Macheng and Gwangju City to buy three car dealers, the day before yesterday I went to Gwangju, and now it's time to turn back, and I am going to prepare to take down some industries in the next step, and many of them will be listed in your name. ”

Sun Xin nodded, there is naturally no need to talk nonsense about such things, so he will also wait to listen to the following.

Huang Jie continued: "After I made plans for manpower, financial and material resources, I thought about how to fight him if this Yan Agu really came in the future. I thought, if you want to be an enemy, one must have a strong army in your hands, and this strong army must not let the court know. After Yan Agu came to fight, we led the strong army to fight him. But think about it again, this Liao country is strong in the iron cavalry, since the Liao national iron cavalry has been defeated by Wanyan Agu, then the iron cavalry under Wanyan Agu is naturally stronger than the Liao iron cavalry, and the strength of this iron cavalry is that it is strong in coming and going like the wind. But although I knew that he was coming, I didn't know when he was coming, so I could only respond when he came, then...... The biggest problem in front of us is how to quickly lead the army to Bianliang City. ”

Sun Xin's brain is not stupid, and when he turned Huang Jie's words in his mind, he also understood most of it: "What Da Lang means...... Could it be that these four lanes will be repaired all the way to the bottom of Bianliang City? ”

"Not bad!" Huang Jie lifted the hem of the straight jacket on his body, squatted on the ground, picked a bamboo branch on the broom and drew it on the ground, and said: "Second brother, look, if you want to go from Huangzhou to Bianliang, it can be said that you are going all the way to the north, passing through Gwangzhou, Caizhou, and Yingchangfu, which is more than a thousand miles. If it is calculated as 60 miles a day according to the infantry drill, it will take 20 days to set off from Huangzhou and go straight to Bianliang. ”

Sun Xin frowned when he heard this, and said: "Traveling sixty miles a day is a forbidden military regulation, and you can only do it without carrying a burden, but you still have to take three breaks and one break, otherwise you will travel thousands of miles to reach the city of Bianliang, but I am afraid that the soldiers will be unable to fight even if they do not collapse." ”

The so-called Song Army Drill Code stipulates that all soldiers marching on the road should rest neatly for ten miles, dry grain (lunch) for thirty miles, and food and lodging for sixty miles. But in fact, this kind of marching speed is impossible for ordinary van troops or miscellaneous armies, and even forbidden armies cannot march at this speed for a long time.

Therefore, Sun Xin scoffed at Huang Jie's proposal to travel 60 miles a day, because for the army of the Great Song Dynasty today, the normal marching speed is at most 30 miles a day, and the elite troops can barely maintain a period of 40 miles a day, and the speed of 60 miles a day normally requires soldiers to march forcibly without carrying baggage, and they must rest for a day after walking for three days.

Of course, don't compare it with the fact that later generations dared to run a full horse (nearly 100 miles) or a half horse (nearly 50 miles) casually, not to say that the physical fitness of the ancients was inferior to that of later generations, but that the ancient army marched not empty-handed.

Huang Jie felt justified when he heard this, so he nodded and asked, "If it's all cavalry, how many days will it take?" ”

Sun Xindao: "If you carry a heavy load, the cavalry should not travel more than 100 miles a day, and the horsepower still needs to be stored, and it is inevitable to take five breaks and one rest, and you need to feed concentrate three days before the battle, so it will take at least 15 days to travel a thousand miles." ”

Huang Jie nodded and said: "In such a flat calculation, it must be at least seventy miles a day, so I thought, this manpower is exhausted, why not know some brains on this road." ”

Sun Xin said: "In my opinion, what's the use of the road being widened, but it's not for people to go?" ”

Huang Jie asked rhetorically: "What if you don't have to go?" ”

Sun Xin also wondered: "How can you not go?" But he had to fly over with wings under his ribs? ”

Huang Jie said with a smile: "What if people, baggage, equipment and even horses are loaded in a cart, dragged by horses, six horses, or even eight horses, and galloped along these four lanes?" ”

Sun Xin thought about it and calculated: "Even if it is driving, it only retains manpower, and the horsepower is not the same cost, and it may not be able to save much time." ”

Huang Jie clapped his hands, praised Sun Xin, and said: "If I have a way to build a track, I can make the carriage travel 500 miles a day and 300 miles at night, and put all the people and horses and equipment in the cart and drag it, what about it?" ”

Sun Xin scratched his head and said, "The carriage can travel eight hundred miles in a day and night? What kind of road is this track? ”

Huang Jie said: "This so-called rail road is Qin Chi Road!" The real Qin Chi Dao! ”

Sun Xin's eyes widened, although his expression was unbelievable, but he still insisted on believing it, because it was not the mountain village man who said this, but Huang Jie Huang Ziying, he immediately rubbed his hands anxiously, and said: "Da Lang, tell me quickly, now the military post of the imperial court is only six hundred miles at the earliest, what is the reason for this track, it can make the carriage travel eight hundred miles in a day and night?" ”

Huang Jie beckoned to Sun Xin and asked him to squat down as well, and then said: "This matter was originally a secret from my master, so now I might as well tell my second brother about it." However, it is said that the original text in this "Hanshu Jiashan Biography" is that Qin Wei gallops in the world, the East is poor and Yanqi, the South Pole Wu Chu, above the rivers and lakes, and the view of the coast is complete. Fifty steps wide, three zhang and tree, thick outside it, hidden with golden vertebrae, tree with green pine. The ancestor of the previous generation in my master can read this section, some puzzled, this poor Yanqi in the East, Wu Chu in the South Pole, above the rivers and lakes, and the view of the coast is complete, and the former dynasty poet Li Taibai's "Dynasty Speech White Emperor Caiyun, thousands of miles of Jiangling one day" is a meaning. ”

After Huang Jie finished speaking, he saw that Sun Xin still opened his eyes and didn't know what to do, so he said: "The meaning of 'above the rivers and lakes, the view of the coast is complete', the ancestor originally thought that it meant that this Yanqi and Wu Chu could be reached, as Wang Xizhi said in the "Lanting Collection Preface": The sages are all over, and the young are long and salty. Later, I read the classics and realized that this 'Bi Zhi' actually means 'Bi Zhi can be reached', and Bi You Tong Yi, that is, whether Yan Qi goes to Wu Chu, or from the land of rivers and lakes to the coastal city, it can be reached the next day. Therefore, the ancestor searched all over the Qin Shi relics, and finally found the true trace of Qin Chi Road in Nanyang, and the mystery was in the track. ”