1. Library: Go to the local library to find books about Shan Hai Jing or China myths and legends, which contain relevant records about Fusang branch.
2. Online search: You can find relevant documents or materials by searching online for keywords such as Classic of Mountains and Seas, Huang Bei Volume of Mountains and Seas, and Fusangzhi.
3. Reference of academic materials: refer to relevant academic research papers or scholars' works, and have a more in-depth interpretation and analysis of Shan Hai Jing and its legends.