You're Exploring the Moon, So Why Are You Exploring My Base?

In 2077, humanity once again set out for the moon.

China carried the hopes of humanity, intending to break through the “sky screen” that had long kept people from landing on the moon.

But...

The Guangguang, bearing the hopes of hundreds of millions of Chinese people, still ran into trouble in lunar orbit.

The Guangguang made an emergency landing and crashed on the lunar surface. There was no way to rescue the crew in time, and everyone on board was expected to perish.

As the whole nation mourned and the survivors aboard the Guangguang prepared to face death, a knocking sound and a voice came from the outside of the spacecraft's hull.

“Hello, hello? Is anyone there? Is anyone there?”