Shanghai's education resources are not endless, but rather, facing scarcity.

Among students with Shanghai hukou, or household registration, only half of middle school graduates are able to enter high schools, and less than 15 percent can attend key high schools. It is unfair to say every Shanghai student can get into universities with no effort.

It is reasonable for a city to consider its residents a priority when resources are scarce. Shanghai authorities have already invested a large sum in migrant children's education. I've learned online that last year, the investment had reached 10 billion yuan ($1.6 billion) for migrant students' education in Shanghai, and more than 30 billion yuan has been added for education infrastructure.