At the 2019 International Rail Transit Technology Exhibition, Li Yanfeng, Lin Zhenyi, and Tan Jingzhou, core members of the R&D team of Jiangche Group, made a high-profile appearance with the latest high-speed EMU "Jiangcheng Star". Back in 2015, when high-speed rail was developing rapidly, due to a stalemate in the two-year-long joint venture negotiations with Menzel, Jiangche Group decided to let the project team led by Lin Zhenyi test the car three months in advance to win the Lionsea order. At the same time, Li Yanfeng, who was studying at Lionsea University, became the driver of the test run by mistake, and recognized that the person in charge of the Lionsea test run was Lin Zhenyi, his crush when he was a teenager, but he did not expect the test run to fail. Li Yanfeng followed Lin Zhenyi back to China, and at this time Lin Zhenyi fell in love with Tan Jingzhou, the leader of the young generation of Jiangche. After returning to China, Li Yanfeng secretly helped Lin Zhenyi to repair the locomotive and helped Jiangche repair the Shanghai urban rail locomotive. At the same time, Tan Jingzhou and Menzel's representatives fought wits and courage for a long time. Menzel questioned Jiangche's use of Li Yanfeng's Menzel technology to repair the Shanghai urban rail locomotive, and proposed non-competitive additional terms in the negotiation, which Tan Jingzhou and Jiangche could not accept. Jiangche employees, who were in urgent need of proving their self-worth, took over the high-speed train manufacturing order from Yunlai under the leadership of Lin Zhenyi. Li Yanfeng followed all the way to pursue love. Yunlai was dangerous and stuffy, and it was extremely unsuitable for high-speed train operation. In order to successfully win the order, Li and Lin overcame many difficulties, not only achieving technological breakthroughs, but also the beginning of their emotional budding. After experiencing the Lion West test run, Yunlai orders, and subway locomotive repairs, Jiangche Group made up its mind to stop the joint venture negotiations with Menzel and unswervingly follow the path of independent research and development. After many difficulties, the Yunlaiguo project finally succeeded, which overall improved the international reputation of China's Jiangche locomotive technology and attracted international attention. At this time, Jiangche faced a bigger challenge - to fully realize the speed increase of trains (Jiangcheng Star), gather outstanding scientific researchers from all walks of life to overcome technical difficulties, successfully break through a series of world locomotive technology innovation problems such as bogie technology and motor technology, realize the speed increase of my country's trains, step by step lead Jiangche high-speed rail to the peak of the world technology stage, and prove to the world the strong strength of China's independent research and development technology.