What is the meaning of poetry? What can poetry express?

Poetry is the oldest and most basic literary form in the world, and it is a literary genre that expounds the soul. Poets need to master mature artistic skills, and express social life and human spiritual world with concise language, abundant emotions and rich images according to certain requirements of syllables, tones and rhythms. In ancient China, those who are unhappy are called poems, and those who are happy are called songs. Later generations will collectively refer to them as poems.