What are the musical characteristics of the classical period?

Music in the classical period emphasized balanced and symmetrical forms. Based on the aesthetic feeling of ancient Greece, they paid attention to the harmony of musical form and beautiful melody, and the harmony became simple and direct, and the rhythm was much more vivid. At the same time, this period produced some new musical forms, such as classical sonatas, concertos, symphonies and chamber music. As a pioneer of classical music, Haydn's attitude towards writing music has always been down-to-earth, step by step, because he had to rely on his employer to make a living at that time, and his music always had the spirit of serving his employer, but his works always grew with new music ideas and made great contributions to creating new music forms. His cheerful personality and hard work on music made him a model figure in the music industry in the Enlightenment.