May-June and before the end of 65438+February every year. According to the information of People's Republic of China (PRC) and the official website, the selection is conducted twice every semester or academic year by the government of the Ministry of Education of China. Before the end of May-June and 65438+February every year, the top five candidates are students registered in schools, including primary school, junior high school and senior high school students. At the school level, in principle, it is selected by class every semester.