To Secure the Interior, One Must Conquer the Exterior First

After He Shan successfully developed a new energy-saving car at the scientific research institute, he fell into a coma due to overwork. When he woke up the next day, he found that he had traveled to a world that seemed different from ancient times. Because He Shan's ideas were incompatible with the ideas of this era, it seemed that He Shan had changed the times, or the times had changed him. (Single heroine)