School districts in the United States are generally so-called rich and white areas. Families who buy houses in that place are very rich, so their children are of high quality. They will also donate money to schools and organize some school activities. There are good schools in rich areas, not that you have to go to any rich area to buy a house to get into a good school.
In fact, there is no concept of school district in the United States. Two high schools in Silicon Valley account for 7% of the country. Their parents are smart, good at genes, good at family education and rich. That kind of family can teach good children even if it is a tutor, which has little to do with the school.
The United States mainly has good children and good parents, so it has formed a better campus. China is a policy school with good teachers and strict management.