Liu Cixin's 2018 is a science fiction novel about the changes that will happen to the Earth in the next few decades and how humans will respond to these challenges. In the novel, human beings have realized the threat of climate change and began to take action to reduce greenhouse gases and protect the earth's ecological environment. At the same time, humans also faced other challenges such as resource scarcity, population growth, social injustice, and so on. The protagonist of the novel was a scientist who led a group of scientists and ordinary people to work together to meet these challenges. Through constant exploration and innovation, humans finally found some solutions and made some progress. "2018" is a novel about how humans work together in the face of various challenges. It shows us the courage and determination of humans in the face of global problems.