Because it is a G major sonata, it is difficult to play.

G major is a major mode with G as the central note. The parallel minor is E minor, which is counted as a sharp in the staff.

The G natural major scale is G A B C D E #F G, which also includes G harmonic major and G melodic major. The G harmonic major scale is G A B C D E flat #F G, and G major is a sharp. Equivalent to Fa in the key of C sharp.

Sonata is a way of writing instrumental music. The word comes from the Latin word sonare, which means to make a sound. In the history of classical music, this musical form has developed differently with the different styles of each music school.

The form of sonata has been gradually developed and improved since the classical music period. At the beginning of the 19th century, a large number of sonatas for various musical instruments appeared, and sonatas have become the main expression of Western classical music.

In the 20th century, composers were still creating sonatas for musical instruments, but compared to the sonatas of the classical and romantic schools, the sonatas of the 20th century had a different appearance in terms of musical form. .

Also known as "sonata suite". It consists of 3 or 4 contrasting movements, played as a solo instrument or as an ensemble with a piano.

Piano grading is the piano grading method described in the "National Piano Performance Grading Works Collection (New First Edition)" compiled by Zhou Mingsun. It is divided into 10 levels, and the highest level is level 10. .