What is Cuju? Say the history of Cuju in China in your own words.

cuju (C29Jū), a skill and sport widely popular among the Han people in ancient China and even the national army, is the origin of football today. As an important culture of the Han people, it has influenced other nationalities until it gradually spread to the world.

Cuju has been circulating for more than 2,3 years. It originated in Linzi, the ancient capital of Qi during the Spring and Autumn Period and the Warring States Period. It was the most prosperous in the Tang and Song Dynasties, and there were often scenes of "the ball never falls all day" and "the ball never leaves the foot, and the foot never leaves the ball, and Hua Ting watches it and thousands of people pay tribute". "Warring States Policy" and "Historical Records" are the earliest records of cuju. The former describes the popular cuju activities in Linzi, the capital of Qi State, more than 2,3 years ago, while the latter records that cuju was a way to train soldiers and examine the physique of soldiers at that time.