216 years ago today, on May 31, 1809 (April 18, 1809 lunar calendar), the famous Austrian composer Haydn died. Haydn (1732.3.31-1809.5.31), an Austrian composer. Born in the countryside, he received music enlightenment education at the age of 6. At the age of 8, he became a church choir singer and learned cultural and musical knowledge. He served as the court principal of the count from 1758 to 1766. At this time, he composed a large number of musical works. In 1791 and 1794, he went to England twice to conduct orchestras and compose music. He received an honorary doctorate in music from Oxford University in London. Haydn is one of the representatives of the Vienna classical music school. His works are extensive and extensive, covering all fields of vocal and instrumental music. The early works were in the transition from Baroque to classical style. Since then, a large number of musical practices have gradually formed the form of modern symphonies and quartets, and the dual-control orchestra system based on four-part strings. After the 1990s, his creations reached a state of perfection. The music structure is rigorous, the rhythm is full of vitality, and it has the style characteristics of the typical classical music school. Haydn's main works include: 108 symphonies, 2 piano concertos, 2 violin concertos, 2 cello concertos, 2 horn concertos, 5 violin concertos with wheels, 8 organ concertos, 82 string quartets, 30 piano trios, 125 hippies, 56 string trios, 52 keyboard sonatas, 5 variations, 20 operas, 6 oratorios, 8 cantatas, 14 masses, and a large number of choruses, songs and song transformations.