Courtyard Chronicles: The Scientist Who Changed History

When brilliant scientist Tan Su awakens in 1960s Beijing's iconic Siheyuan courtyard, he brings with him knowledge that could reshape a nation's destiny. Armed with cutting-edge nuclear submarine technology and a mysterious sign-in system that rewards patriotic deeds, he faces an impossible choice: hide his secrets or risk everything to accelerate his country's rise to superpower status. In an era of red flags and revolutionary fervor, one man's technical genius becomes the catalyst for historical transformation.