Special Forces: I Develop Technology in Primitive Tribes

Zhang Shuai, a special soldier, was struck by a strange lightning while performing another top-secret special mission, and actually traveled through time? There's bad news, this is a parallel world to Blue Star. But we are still in a primitive society... The good news is that I have awakened the exchange system and brought over five thousand years of Chinese civilization! What bad news? All good news to me. Let's hear Zhang Shuai shout! "Your king is back!"