What service is piano, chess, calligraphy and painting?

Chyi Chin's calligraphy and painting is one of the four traditional arts in China, including Qin Yi, chess, calligraphy and painting. These art forms are very important in the history of China and are regarded as one of the essences of traditional culture. Each art form has its own unique skills, styles and expressions. In ancient times, learning and mastering piano, chess, calligraphy and painting was considered as a necessary accomplishment for literati. In modern times, Chyi Chin's calligraphy and painting is still a favorite art form of many people. People can experience the charm of China culture by learning and appreciating Chyi Chin's paintings and calligraphy. Therefore, piano, chess, calligraphy and painting can be regarded as a service to provide artistic appreciation and learning.