In the science fiction novel "Why Jianghua Does Not Return to the Home Planet," the protagonist Jianghua is unable to return to their home planet due to a combination of technological limitations and personal choices. The novel explores themes of identity, destiny, and the consequences of one's actions. Jianghua's inability to return is rooted in the advanced technology of their home planet, which has rendered interstellar travel impossible for them. Additionally, Jianghua's personal growth and the formation of new relationships on Earth contribute to their decision to remain on this planet.

The novel's narrative is supported by a wealth of scientific and philosophical concepts. For instance, the advanced technology of Jianghua's home planet is described as having reached a level where interstellar travel is no longer feasible. This is illustrated through the use of complex equations and theoretical physics, which suggest that the energy required for such travel has become insurmountable. Furthermore, the novel delves into the psychological aspects of Jianghua's situation, highlighting the emotional ties formed with Earth's inhabitants and the fear of losing these connections upon returning to their home planet.

Data from the novel suggests that Jianghua's home planet has a population of approximately 5 billion, with a high level of technological advancement. The planet's government has invested heavily in research and development, but the results have been disappointing. According to the novel, the energy required for interstellar travel has increased exponentially, making it impossible for Jianghua to return. This is further supported by the fact that Jianghua's home planet has been unable to replicate the technological breakthroughs that have allowed other civilizations to explore the cosmos.

Additionally, the novel explores the concept of identity and the role of personal choices in shaping one's destiny. Jianghua's decision to remain on Earth is influenced by their emotional connections with the people they have met and the experiences they have had. The novel suggests that Jianghua's identity has been transformed by their time on Earth, making the idea of returning to their home planet a difficult one to contemplate. This is further supported by the fact that Jianghua has developed a deep sense of belonging to Earth, which is evident in their interactions with the local population.

In conclusion, "Why Jianghua Does Not Return to the Home Planet" presents a compelling narrative that explores the complexities of identity, destiny, and the consequences of one's actions. The novel's portrayal of Jianghua's inability to return to their home planet is rooted in advanced technology and personal choices, making it a thought-provoking read for fans of science fiction and philosophy.