Fast travel system space-time transfer station

What is a space-time envoy?What is a space-time transfer station?Do you think you have reached the pinnacle of humanity?Do you think you can turn your hands into clouds and your hands into rain?These superficial cognitions will only make you farther and farther away from the top of the world.In every time and space there is the most mysterious place, and that place controls the fate of all the people in this time and space.They can dial the timeline and let you go back to solution...