In the middle of the 21st century, the destructive power of war was revealed to the world as a country that had existed for thousands of years was completely wiped out. Later, in order to prevent human civilization from disappearing due to war, the whole world unanimously chose to work for peace. To this end, at the United Nations General Assembly, a plan named "Beyond the Sun" based on the Great Navigation Movement was adopted. In the following thirty years, human civilization entered a stage of large-scale extraterrestrial space development. Just 25 years after this project was successfully launched, I, Liu Yi, left the earth as a staff member of the lunar base and went to the lunar pioneer base to train photosynthetic bacteria. I originally lived a stable life for three years, but due to an accident, my colleagues and I were forced to embark on a lunar exile journey.
