What is Spring and Autumn Calligraphy?

During the Spring and Autumn Period, due to the transition from slave society to feudal society, governors attacked each other and the society was in turmoil. There have been many violations of human relations, that is, regicide usurped the throne and Zhou Jun's status declined. Therefore, historians of this period adopted a euphemism for these things. For example, the Zhou royal family was attacked by princes and fled to a certain place, written as "Zhou Jun took office in a certain place". Confucius, who represented the interests of slave owners, was extremely indignant at such things. It is called "Spring and Autumn brushwork".