Space-Time Double Star

When I woke up, I exchanged lives with my "self" in 2480. He is an emotionally numb future archivist living in a virtual paradise; I am a passionate New China engineer rooted in 1950. Now, he must use future thinking to lay the foundation for a powerful heavy industry in the workshop that is waiting to be renovated, and lead his comrades to survive in the era of belt-tightening. And I must use my iron will to conquer the stars and the sea in the future of spiritual desert, and use the simplest faith to shock the civilization that has fallen into despair. The weekly soul exchange has become a battle between two time and space. We use a diary to connect two eras. I use knowledge to arm the ideals of the past, and he uses faith to heal the emptiness of the future. Until the cold "civilization archives" marked us as [observation samples]. Until we heard the footsteps of civilized hunters coming from deep in the starry sky. Past and future, who is whose salvation? What we are exchanging is our bodies, or the last source of civilization - fire.