Transmigrating to a Siheyuan in 1953: Ruthless and Decisive

[System] [Transmigrate into a Siheyuan] [Decisive and ruthless] [Single female lead] With the “Replication System” at his side, Li Guo transmigrates as an injured procurement officer in 1953. He copies top-tier medical skills to save himself in the hospital, then replicates criminal investigation skills in front of the police to solve a case. As soon as he leaves the hospital, Qin Huairu shows up pregnant and pressures him to marry her. He watches coldly as she marries Jia Dongxu, but after catching her secretly involved with Yi Zhonghai, he decisively puts an end to the old bastard's hopes of having children. When Yi Zhonghai schemes to make Silly Zhu support him in his old age, Li Guo turns the tables, exposes his past, and gets him executed by firing squad. When he discovers that Deaf Granny is a spy, he reports her to the police and has her brought to justice. Faced with Jia Zhangshi's tantrums and Qin Huairu's seduction, he uses ruthless tactics: ending their chances of having children, exposing their scandals, and sending them to prison. Soon, there is no place left in the courtyard for those rotten scoundrels. In the end, he leaves with his family, leaving behind the wreckage of a thorough reckoning.