Russian composer Tchaikovsky (1840—— 1893) was born in a noble family and began to learn wisdom at the age of five. He was sent to law school at the age of 0 and worked in the Ministry of Justice after graduation. However, he didn't like this profession himself, and later he joined the Petersburg Conservatory of Music with Ann? Rubinstein studied composition and went to Moscow Conservatory of Music to teach after graduation. In the future, with the support of Nadezhda von Meek, I will get rid of the heavy teaching work and concentrate on creation. Among his works, there are famous ballets Swan Lake, Sleeping Beauty, Nutcracker and symphonic poems Romeo and Juliet, Pathetique and so on. His music is full of inner feelings and dramatic power, which is not only loved by professional musicians, but also appreciated by the public.

Newton (1643- 1727) is a famous British physicist, mathematician and astronomer, and the greatest master of science in17th century. Newton's lifelong contribution to science covered physics, mathematics and astronomy. Newton's most important achievement in physics is to establish the basic system of classical mechanics, making light the first big synthesis in the history of physics. For optics, Newton devoted himself to the study of the color and properties of light and made great contributions. Newton summed up and developed the previous work in mathematics, put forward the "flow number method", established binomial theorem and founded calculus. In astronomy, Newton discovered the law of universal gravitation, made a reflective telescope, and used it to preliminarily observe the laws of planetary motion. Suffering from various diseases in his later years, he died in London late at night on March 30th 1727 and was buried in West Abbey at the age of 84. In order to commemorate Newton, people specially named the unit of force after him, referred to as "cow".