Although juggling in its western form involving props such as balls, rings, and clubs is rarely performed in modern China, at certain periods in Chinese history it was much more popular. In fact, some of the world's earliest known jugglers were Chinese warriors and entertainers who lived during the time of the Spring and Autumn period of Chinese history. References to these artists in ancient Chinese literature have preserved records of their incredible achievements. From such references, it appears that juggling was a well-regarded and highly developed form of ancient Chinese art.