Su Qin
The first mention of "Cuju" in a historical text is in the Warring States era "Zhan Guo Ce", in the section describing the state of Qi. It is also described in Sima Qian's "Records of the Grand Historian" (under the Biography of Su Qin), written during the Han Dynasty. A competitive form of "cuju" was used as fitness training for military cavaliers, while other forms were played for entertainment in wealthy cities like Linzi.