March and September. According to official website of Tongchuan New Area Vocational and Technical College, the registration time of National Open University is divided into spring and autumn, with spring registration before March and autumn registration before September. Specific matters needing attention in registration can be inquired by candidates logging in to official website. The National Open University is a new institution of higher learning directly under the Ministry of Education, which provides open education for the whole country. Therefore, the national open university of Tongchuan New District Vocational and Technical College will register before March.