Lin Yuan led Qian Sanqiang and Qian Xuesen to successfully develop vacuum tubes and repair radios using local methods in the ruined temple, demonstrating their technical strength to Long Yun. Faced with Lin Yuan's accurate prediction of Japanese air strikes, Long Yun laid an ambush. At 5:15 in the evening, the Japanese aircraft formation arrived as expected, but fell into the preset air defense firepower network and was severely damaged. Kunming achieved an unprecedented victory. Long Yun admired Lin Yuan so much that he not only rewarded him with large sums of money, but also fully liberalized warehouse resources and manpower authority. At the same time, Lin Yuan triggered a system upgrade to unlock the advanced talent scanning function. In order to further develop radar, he requested to collect Japanese aircraft wreckage and electronic intelligence, officially starting the road of serving the country through science and technology.
