The necessary knowledge to write a cultivation novel was as follows: 1. Cultivation system: Cultivation novels often involve one or more cultivation systems. These systems have different characteristics and rules, such as Taoism, Buddhism, Confucianism, etc. Understanding these systems can help you build a better world of cultivation. 2. Cultivation methods: Cultivators in cultivation novels usually have different cultivation methods such as alchemy, internal cultivation, talismans, arrays, etc. Understanding these methods will help you construct a world of cultivation and allow readers to better understand your story. 3. Xianxia elements: Immortal novels often involve Xianxia elements such as myths, legends, martial arts, etc. Understanding these elements can help you build a world of cultivation and make your novel more distinctive. 4. Combat System: Cultivators in cultivation novels usually need to fight with enemies. Understanding the combat system can help you build powerful enemies and battle scenes and improve the reading of the novel. 5. Worldview Setting: The worldview setting of a cultivation novel is very important. It can help you construct the background, history, and characters of the cultivation world. Understanding the setting of the world can help you better grasp the nature and characteristics of the world of cultivation. 6. Spirit Beast System: In cultivation novels, spirit beasts are usually very important elements. They can provide strength, companionship, and assistants. Understanding the spirit beast system can help you build a strong image of the spirit beast and improve the reading of the novel. Magic System: The magic system in cultivation novels is also an important element. It can help you build a powerful magic image and improve the reading of the novel. Character Setting: The character setting in a cultivation novel is very important. Their personality, experience, goals, strength, etc. will affect the development and ending of the entire story. Understanding the character settings can help you build strong character images and improve the readers of the novel. The above is the necessary knowledge to write a cultivation novel. I hope it can be of help to you.