Three open universities are not private schools. "Santai Open University" refers to a higher education institution in Santai County, Chengdu, China, which belongs to a public college. Different from traditional universities, the Open University adopts "open education", that is, it provides part-time and autonomous higher education for people from all walks of life. Therefore, the open university is different from the traditional university in enrollment and management. It should be noted that in China, private schools refer to higher education institutions founded and operated by individuals, enterprises or social groups, rather than public institutions funded or directly managed by the government. Therefore, "three open universities" do not belong to the category of private schools.