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Li Qingwen traveled to another world and was reborn as a young boy with mental retardation. His family had many people but little land. In order to fill his stomach, he began to think about making money. Making candy and playing a sliding block game. By chance, he saw his lifesaver Jiang Cong in the county town. At this time, Jiang Cong was a criminal and was escorted to the far north. His leg injury was serious. Because of delayed treatment, it worsened and it was difficult to walk to the exile place thousands of miles away. Li Qingwen and his brother decided to escort the benefactor to the border town. The border town was bitterly cold, with snow in August and frost for more than half of the year. The wilderness was surrounded by wild beasts. In the north, there was the constantly harassing Luoche Kingdom, and in the east, there were the eager Puju people. The exiles had to farm, feed horses, build cities, fight, and run around. All the exiles dreamed of amnesty from the court. Li Qingwen proposed to make meritorious contributions to redeem himself from his crimes. He and others planted trees, reclaimed wasteland, planted medicinal herbs, built roads, dug canals, and opened up trade. Hundreds of thousands of barren hills turned into green hills, wastelands turned into fertile fields, and the border town turned into a pearl outside the Great Wall. Jiang Cong was imprisoned, but he was unyielding. He repeatedly made extraordinary achievements on the battlefield, and was not afraid of difficulties and obstacles. In the end, he held freedom in his hands.