足球被广泛认为是世界上最受欢迎的运动。据报道,目前每年从事足球运动的人口超过4亿~([1])。中国约有14亿人口~([2]),是全球人口最多的国家,但是足球水平却与巨大的人力资源并不匹配。因此,自2015年起,中央政府部门开展了一项自上而下的足球改革,不仅覆盖了职业足球,还包括校园足球和草根足球等各个方面,目的是更好地发展中国的足球运动,而青少年足球正是此次改革的焦点之一~([3])。考虑到 Football is widely regarded as the most popular sport in the world. According to reports, the current annual number of people engaged in football more than 400 million ~ ([1]). About 1.4 billion people in China ~ ([2]) are the most populous countries in the world, but the level of football does not match the huge human resources. Therefore, starting from 2015, the central government department has launched a top-down reform of football that covers not only professional football, but also campus football and grassroots football in order to better develop China’s football. Youth football is one of the focuses of this reform ([3]). considering