It means that you must know your ambitions when you are young, that is, have lofty ambitions, so that you can achieve a career.
Only the huge force like thunder can make the land of China full of vitality. This sentence "Young Man Ruo Ling Yunzhi" comes from "Six Quatrains for Play" written by Du Fu.
Ancient poetry is a general term for ancient Chinese poetry, which refers to poetic works created by ancient Chinese people. Ancient poetry in the broad sense includes poems, lyrics, and Sanqu. Ancient poetry in the narrow sense only refers to poetry, including ancient poetry and modern poetry.
On the one hand, metrical poetry is also called modern poetry, which is a type of ancient Chinese poetry. It is a poetry style that took shape after the Tang Dynasty. It is mainly divided into quatrains and rhythmic poetry. According to the number of words in each sentence, it can be divided into five characters and seven characters. There are certain specifications for the text structure and sentence structure. There are certain rules for phonology, and certain rules are required for changes in use.
On the other hand, the so-called free verse genre is poetry without regular syllables, rhymes and other formal designs. It pursues "organic form" and relies on the natural rhythm of speech.