Courtyard Soldier King: Sign-In System Across Worlds

When an elite modern soldier awakens in 1960s Beijing as a steel mill security chief, he's armed with more than just military training—he has a reality-bending sign-in system. Daily rewards grant him a pocket dimension with a spiritual spring, genetic enhancement serum, and legendary martial arts mastery. While navigating factory politics and marrying the beautiful teacher Ran Qiuye, he secretly battles foreign spies and aids local law enforcement. But when danger forces him to flee to Hong Kong, he builds an empire from nothing, becoming the city's underground king while defending his homelan…