What could poems be classified into according to their content? What could they be divided into according to their forms?

Ancient poems can be divided into many types according to their content. The following are some of the common types: 1 Fu: It was a long ode mainly used to express gratitude, praise, praise, and other emotions. [2: A comparison poem. By comparing the advantages and disadvantages of different things, the author can express his views and attitudes.] 3. Lyric poems: mainly express the author's lyrical feelings or describe the natural scenery, the life of the characters, etc. 4. Narrated poems: They mainly describe historical events, myths and legends, and stories of characters to express the author's emotions and thoughts. 5. Satirical poems: They express criticism and satire of society by describing unhealthy phenomena in society. 6. Mythological poems: mainly narrating mythological stories to express the author's understanding and perception of nature and the universe. Yuefu Poetry: It was a new form of poetry that began to form in the Han Dynasty. It mainly described music and dance. 8. Tang poetry: It was a poem from the Tang Dynasty that was famous for its superb artistic level and unique style. Song Ci: It was a literary form of the Song Dynasty, famous for its beautiful words and expressive language style. Although these types were somewhat similar, each type had its own unique characteristics and ways of expression.

Prose is a genre of literature that is usually not categorized by subject or content, but by form and style. According to different classification standards, prose can be divided into the following categories: Travel Prose: Description of the author's experiences and thoughts on these experiences. 2. Commemorative prose: Commemorating someone, something, or something as the theme to express feelings by narrating the past, recalling the past, etc. 3. An argumentative essay: The author's own opinions or thoughts on a certain issue are usually not related to specific people or things. 4. Lyrical prose: express the author's emotions by describing characters, scenery, or inner feelings. 5. Description of the characters, scenery, or inner feelings as the theme to show the characteristics of a scene or character through detailed description. These are just some common classifications. In fact, prose can be classified according to many different standards.

According to the language forms, novels can be divided into two categories: narrative language novels and non-narrative language novels. Narrative-language novels usually use formal, professional, and rhetorical language to describe characters, plots, and environments as the main means to make readers feel as if they were there. This type of novel was more commonly seen in literary works, historical biographies, science fiction novels, and so on. Non-narrative novels, on the other hand, usually used more easy-to-understand language and paid more attention to the plot, characters, and story itself. This type of novel was more commonly seen in popular novels, online novels, light novels, and so on. It should be noted that different forms of language have different effects on the novel, so the language form of the novel can also vary according to different cultures, backgrounds, and reader groups.

Ancient poems could be divided into the following categories according to their content: 1. Landscape and Pastoral Poetry: The theme is to describe the beauty of the landscape and the countryside, such as Wang Zhihuan's "Climbing the Stork Tower" in the Tang Dynasty and Su Shi's "Shuidiao Getou" in the Song Dynasty. 2. Love poems: Take expressing love as the theme, such as Bai Juyi's Song of Everlasting Regret in the Tang Dynasty and Lu You's The Phoenix with a Skinned Head in the Song Dynasty. 3. Political satirical poems: satirizing political corruption and social injustice as the theme, such as Du Fu's "Ascending" in the Tang Dynasty and Xin Qiji's "Sapphire Case·Yuanxi" in the Song Dynasty. 4. Historical epic poems: to reflect historical events and historical figures as the theme, such as the Tang Dynasty Wang Changling's "Liangzhou Ci" and the Song Dynasty Su Shi's "Jiangcheng Zi: Mizhou Hunting" and so on. 5. Philosophic poems: To express philosophical thinking and life feelings as the theme, such as Wang Zhihuan's "Climbing the Stork Tower" in the Tang Dynasty and Su Shi's "Shuidiao Getou" in the Song Dynasty. 6. Poetry that reflects social reality: poems that reflect social reality, such as Bai Juyi's Song of Everlasting Regret in the Tang Dynasty and Xin Qiji's Sapphire Case of the New Year's Eve in the Song Dynasty.

The novels could be divided into the following categories according to their length: 1. Short stories: Short stories are usually short and compact, often less than 200 words, suitable for magazines, newspapers and other traditional media. 2. Novellas: Novellas are usually between 300 to 10,000 words long. The characters and scenes involved in the story are relatively complicated. They are more suitable for being serialised on new media platforms such as magazines and websites. 3. Long novels: Long novels are usually long and have complicated plots, involving many characters and scenes. It usually takes a long time to finish writing and is suitable for publication or serialisation. 4. Unlimited novels: Unlimited novels are novels that divide the length of the novel into an infinite number of segments, and there is no continuity between each segment. Such novels were often used in virtual reality, games, and other fields. 5. An outline novel: An outline novel is a novel that first outlines the entire plot and character development, and then gradually writes the novel according to the outline. This kind of novel was usually used for writing plans and creative guidance.

Shi Shuo Xin Yu was a novel that was categorized into language according to its content. It mainly narrated the speech, manners, and stories of ancient celebrities, including a lot of interesting and nutritious content.

Ancient Chinese poems were numerous and rich in content. They could be divided into the following categories: 1. Poem of the bold and unconstrained school: The representative figures include Su Shi and Xin Qiji, who mainly describe bold and unrestrained emotions such as "Sapphire Case·Yuanxi" and "Shuidiao Getou·Bingchen Mid-Autumn Festival". 2. The poems of the graceful and restrained school: The representative characters include Li Qingzhao, Xin Qiji, etc., which mainly describe delicate and soft emotions, such as "Dream Order·Chang Ji Xi Ting Ri Mu","Sapphire Case·Yuan Xi", etc. 3. Landscape and Pastoral Poetry: The representative figures include Wang Wei, Meng Haoran, etc. They mainly describe the beauty of landscape and countryside, such as "Mountain Journey","Spring Dawn","Moored Boat on Guazhou", etc. 4. Love poems: The representative characters include Li Bai and Du Fu of the Tang Dynasty, who mainly describe love, marriage and other topics such as "Song of Everlasting Regret" and "The Phoenix with a Head". 5. Political poems: Representative figures include Bai Juyi and Wang Zhihuan of the Tang Dynasty, who mainly describe political and social issues such as "Climbing the Stork Tower" and "Liangzhou Ci". 6. Historical poems: Du Fu and Bai Juyi of the Tang Dynasty are the representative characters. They mainly describe history and historical figures such as Ascending High and Remembering the Past at Red Cliff. There were many kinds of ancient Chinese poems, each with its own unique characteristics and style.

According to length, novels could be divided into long novels and short novels. Long novels were generally longer and had more complicated plots, more characters, and more emotional clues. At the same time, they also had higher literary value and artistic appeal. Common long novels included Dream of the Red Chamber, Romance of the Three Kingdoms, and Water Margins. Short stories were generally shorter, and the plot was relatively simple. There was usually only one main character, and the emotional clues were also relatively simple, but they could also show the author's creativity and imagination. Common short stories included Andersen's Fairy Tales, Grimm's Fairy Tales, and Journey to the West.

The novels can be divided into the following categories according to length: 1. Short stories: Usually short, usually between 500-2000 words, such as the "Three-body" series,"Wandering Earth", etc. 2. Novellas: Medium length is generally between 2000-5000 words, such as "Ordinary World","Living", etc. 3. Long novels: The length is generally more than 5,000 - 20,000 words, such as Dream of the Red Chamber, Journey to the West, etc. 4. Epic novels: Longer, generally more than 20000 words, such as Romance of the Three Kingdoms, Water Margins, etc. 5. Science fiction novels: usually with science and technology as the theme, the length is generally between 2,000 - 5,000 words, such as the "Three-Body" series,"Wandering Earth" and so on. 6. Fantasy novels: Usually with magic and fantasy as the theme, the length is generally between 2,000 - 5,000 words, such as Harry Potter series, Lord of the Rings, etc. 7. Historical novels: Usually with historical events and characters as the theme, the length is generally between 2000-5000 words, such as "Records of the Historian","Romance of the Three Kingdoms", etc. 8. Modern novels: Usually with urban, youth, love, etc. as the theme, the length is generally between 2,000 - 5,000 words, such as "A slight smile is very beautiful","Why the Silent Flute", etc.

The classification of alien civilizations may vary according to the research and views of scientists, but it can usually be divided into three levels to show the difference in their development and technological level. The first level is the lower level of alien civilization, which may only have limited technology such as energy weapons or limited space exploration. These civilizations may be in the solar system or on nearby planets, but they may not have created complex life forms or highly developed technology. The second level was the medium-level alien civilization. They might already be able to use nuclear fusion energy, advanced computers, and communication technology. These civilizations may already be able to explore the entire galaxy, but they may still face some technical and environmental problems. The third level is a highly developed alien civilization. They may have created a highly intelligent life form, mastered the mysteries of the universe, and even controlled the entire galaxy. These civilizations may have developed sophisticated space travel and time travel technology, but they may still face some unknown challenges and problems. It should be noted that the above classification criteria was only a scientist's point of view and was not universal. At the same time, due to our current limited exploration of alien civilizations, we are unable to determine which standards are more accurate.