1. Difference in government investment: There are differences in government investment in different types of schools, and the government investment in rural primary schools is relatively small, resulting in low income from rural primary education funds.

2. Differences in private investment: In addition to government investment, there are also differences in private organizations and individuals in different types of schools. Some charitable organizations or individuals will choose to donate to schools in cities or developed areas, giving less consideration to schools in rural areas, resulting in less statistics on local rural primary education funds.