Master of Civil Engineering: People Built the Great Wall in the Song Dynasty

Traveling through time and becoming a border military lieutenant in the Northern Song Dynasty, Shen Mo opened his eyes and was told: his predecessor had just been beheaded, the city wall collapsed, and the Liao army's three thousand cavalry had arrived thirty miles away. Shen Mo looked at the city protection order in his hand and smiled. Others defend the city by their lives, but he defends the city by drawing pictures. The three-component soil formula, the bastion structure, the three-stage strike of the repeating crossbow, and the optimization of the gunpowder ratio—the final project of the master's degree in civil engineering were all thrown into this broken city. On the day of beheading, he personally beheaded the greedy Treasury official. Three days later, the Liao army attacked the city for the first time, killing 300 people and not even touching the base of the city wall. A month later, the supervisor came to extort money. He asked someone to slap the ledger on the table: "The money has been spent and the wall has been repaired. If the Liao army comes again, you can go up to the wall and shoot arrows." Three months later, the Baozhou city wall was covered with stone, 300,000 elms and willows were planted outside the city, 80 crossbows were built, and the firearms camp conducted its first test explosion, which destroyed half of the ruined wall. Yerunugua, the wise general of the Liao army, stood five miles away, looked at the telescope for a long time, and asked the deputy general: "What is this man's background?" No one can answer. They only know that this city will not be easy to fight in the future. Shen Mo stared at the north, knowing in his heart: This is just the beginning. The Liao people will come back. There will be people in the court joining him. Technology will be lost. He had to build this city into a cemetery for the Liao army before all this happened. ——From being an official of the ninth rank to being the deputy envoy to the Privy Council, from Baozhou to Yizhou, from rammed earth walls to fortresses, he spent twenty-seven years building an iron-clad border defense line for the Song Dynasty. Even after his death, Baozhou City held on for half a year. Jin Shuai Wanyan Zongwang sighed: "If all the people of Song Dynasty were like the generals of Baozhou, how could we reach this point?"