Episode 15 recap: The Vanguard Company was renamed as the First Road Construction Battalion. Sha Kai felt jealous when Ye Lan and Luo Xiang Qian interacted.

The Vanguard Company was renamed as the First Road Construction Battalion. Sha Kai felt jealous when Ye Lan and Luo Xiang Qian interacted.Captain Ma held a meeting. He knew that not everyone could go to participate in the Korean War. The comrades present couldn't understand it, and he himself had ideological burdens.

But since they stayed behind, they had to obey orders. Enjoying the benefits of the military was the highest affirmation and attention from their superiors. Captain Ma announced that the Vanguard Company would be renamed as the First Construction Battalion, and Luo Xiang Qian was appointed as the captain and instructor of the First Battalion. Yu Huizhen was appointed as the director of the First Battalion's medical clinic, and Sha Kai became the head of the technical group in the First Battalion. They were about to be relocated to the Neijiang construction area, where the comrades who were there before had left them barracks that were slightly better than the current ones. However, they still needed to be mentally prepared to overcome difficulties. Captain Ma told everyone that the people of Sichuan had organized a workforce of over 46,000 laborers who were coming from all directions to the construction site. The cadres and soldiers who stayed behind were the sparks and sowers.

Ye Lan, Ma Bin, and Zheng Yan were assigned to the First Construction Battalion to work in technical positions. Luo Xiang Qian led soldiers from Wuzhi and others to welcome them and introduced them to the head of the kitchen team. The head of the kitchen team looked a bit worried after seeing them. Three more people suddenly arrived, including two female comrades. If they were all like Sha Kai, it would be difficult to handle. Luo Xiang Qian hurriedly stopped the head of the kitchen team from speaking recklessly because Ye Lan was Sha Kai's fiancée. He also told the head of the kitchen team that Ye Lan and others had camped in the wild, enduring hardships and dangers while exploring, which was quite remarkable. Sha Kai and Zhang Biao caught fish in the water to prepare a feast for Ye Lan and the others.

Yu Huizhen arranged accommodation for Ye Lan and Zheng Yan in the dormitory. Both of them were happy with the conditions here, which were much better than their conditions while exploring in the wild. When Sha Kai learned that Ye Lan had arrived, he ran over excitedly to see her. The first thing Ye Lan asked Sha Kai was about the layered soil filling and compacting method. Sha Kai casually brushed it off and shifted the blame to his uncle, Sha Menghai. Ye Lan criticized him, saying that if it wasn't his own invention, he shouldn't take credit for it. Sha Kai nodded repeatedly after listening and said that he would listen to Ye Lan in the future. Ye Lan's arrival made Sha Kai very happy, and he promised to take good care of her. They vowed to work together and soar in their careers.

In the evening, Luo Xiang Qian organized a welcome party for Ye Lan and the others. During the party, Luo Xiang Qian performed a Shandong-style quick dialogue to entertain everyone. Then, Ye Lan and Sha Kai performed a bullfighting dance, and the soldiers also showcased their own talents and skills.

Luo Xiang Qian went to the office to answer a phone call and learned that the migrant workers would arrive at the construction site tomorrow. Ye Lan followed him and asked about the layered soil filling and compacting method. Instead of speaking ill of Sha Kai, Luo Xiang Qian praised his active work in the Vanguard Company and the outstanding progress of the First Road Construction Battalion.

Sha Kai followed them and felt uneasy seeing them getting along so well. He sarcastically taunted Luo Xiang Qian and then took Ye Lan away. Ye Lan told Sha Kai that Luo Xiang Qian had praised him, but Sha Kai still felt uncomfortable.

The county mayor personally escorted the first batch of migrant workers to the First Road Construction Battalion. Luo Xiang Qian delivered a warm and enthusiastic welcome speech, which stirred up everyone's emotions. They were determined to devote themselves wholeheartedly to railway construction and start the Chengdu-Chongqing Railway project as soon as possible. To ensure good work with the migrant workers, Luo Xiang Qian and Zhang Biao divided the team into three platoons and promptly arranged for cadres.

The cadres expressed their determination to contribute to the nation's construction through practical actions and strive for the final victory in the Korean War. Luo Xiang Qian delegated the new tasks to everyone and encouraged them to learn from each other and strive to complete the task of leveling the roadbed quickly and efficiently. Luo Xiang Qian approached Ye Lan and suggested that she spread some cultural knowledge among the workers during their spare time. However, Ye Lan felt that the road construction task was already burdensome and was concerned about everyone's endurance.

Luo Xiang Qian believed that a team without cultural knowledge could not achieve good results. He argued that using the rest time to equip everyone with certain cultural knowledge would ensure the quality of road construction. After completing the road construction, when they returned to their hometowns, they would be better able to contribute to the development of their hometowns. Luo Xiang Qian believed that everyone would support this idea. Ye Lan agreed readily after hearing Luo Xiang Qian's reasoning.

During the rest time, Ye Lan used the opportunity to explain the origins of railways to everyone, and they gained new knowledge and insights. Sha Kai, feeling sour seeing Ye Lan and Luo Xiang Qian frequently interacting, approached Luo Xiang Qian and questioned why he was getting so close to Ye Lan. Luo Xiang Qian told him not to be narrow-minded and explained that they were only coordinating their work. However, Sha Kai, being petty, warned Luo Xiang Qian not to get too close to Ye Lan.