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2.OPEN is the first national public service system for distance education approved by the Ministry of Education in China. Mainly relying on the establishment of radio and TV universities distributed all over the country, it provides nationwide all-round support services such as enrollment, teaching, educational administration, examination and management for online education pilot universities, other educational institutions, major ministries and industries to carry out modern distance education. The distance open education center is responsible for the construction, management and operation of the whole public service system.