How are primary schools in Shi Jia divided into classes?

The principle of balanced ratio between male and female students. Primary schools in Shi Jia attach importance to establishing correct views on education, teaching, talents and quality. Primary schools are mainly divided into classes according to the principles of balanced proportion of boys and girls, fairness, openness and justice, and "drawing lots by piles and balanced distribution". Shi Jia Primary School was founded on 1939. After more than 70 years of development, it ranks among the best in Beijing and even the whole country.