1, soft science fiction is a science fiction work that focuses on humanities and life with the possible future/past technology as the background, such as Su Yu's New World;
2. Hard science fiction is a science fiction work that requires a complete interpretation of possible future/past science and technology on the basis of existing scientific and technological achievements, focusing on the great influence and interaction on human form, social survival and natural environment.
Extended data:
Science fiction is short for Sci-Fi Scientific fantasy, that is, according to limited scientific assumptions (the existence of certain things, the occurrence of certain events), fictionalizes possible events without conflicting with the largest amount of known information of human beings (such as existing scientific theories and well-documented event records). Science fiction has developed into a culture and style, and science fiction culture has also become a new culture evolved from science fiction works.
Since the creation of the first science fiction novel (mary shelley's translation of Frankenstein), science fiction has gradually evolved from the original novel form to poetry, movies, TV series, comics and other fields, and gradually developed into a culture.
Orthodox sci-fi fans advocate that science and fantasy are indispensable. If there is no scientific basis, it can only be classified as fantasy, magic or surreal works; On the contrary, if fantasy is not paid, it is just a scientific and realistic story.
Refer to Baidu Encyclopedia-Science Fantasy