The time to go home has come.
Xu Yang left behind enough supervisory equipment and robots, and placed observation stations in orbit to enhance sociological progress, treating Proxima Centauri-b as a petri dish, continuously monitoring the development of those super-green creatures. By the time the next batch of explorers arrives, they should be ready to harvest.
Then Xu Yang activated the Star Gate and piloted The Pioneer spaceship back.
For the crew of the ship, the expedition to Proxima Centauri was like a long-distance march into the unknown, and what shocked them the most was the difference in time and space: despite shortening the journey through the Star Gate, it still took them 4 years to complete a round trip.
