Siheyuan: Catch the Enemy's Special Missiles and Serve the Country

You Jun travels through the courtyard and finds out that he is the orphan of the martyr Miao Hong. He joins the Railway Public Security Department at the beginning and is equipped with a gun! On the train back to Beijing, he accidentally awakened the [Crime Nemesis System] and successfully rescued Zheng Yaoxian, the "Sixth Brother of the Army" who was being hunted! Not only did he acquire Sixth Brother's lifelong knowledge, but he also activated the sky-defying industrial technology tree. After moving into Nanluogu Lane, You Jun smiled when faced with the plots of the beasts in the courtyard: "Want to kidnap people morally? I enforce the law and deal with all kinds of dissatisfaction!" "Want to rob the house? Take it away!" During the day, he was an iron-blooded policeman who frightened everyone. He teased Lou Xiao'e, cut off Hu Begonia, and guided internal combustion engines and missiles to lead a prosperous and powerful country. At night, he was the king of agents codenamed "Judge". He teamed up with Sixth Brother to kill the enemy agents in Forty-Nine City! Zheng Yaoxian: You Jun is the most genius agent and the maddest scientist I have ever seen! Yi Zhonghai: Don't mess with You Jun, that kid really has a real guy in his waist!