Coincidentally, my friend's son was admitted to these two schools, majoring in mechanical engineering. From the overall ranking, of course, South China University ranks first, but you have to look at the difference in the ranking of mathematics majors. As far as the school environment is concerned, I think new york University is better. Although there is no campus, it is not as dangerous as Southern California, and the environment in new york is also very attractive. The weather in LA is very different from that in new york. It hardly snows in LA, and the climate is very dry, while winter in new york is quite cold, so it depends on how you usually feel about winter. In terms of transportation, I'm afraid you have to drive in L.A., otherwise you'll have to take a ride with your classmates when you go to the supermarket in China to buy food, while public transportation in new york is very convenient, with the subway running 24 hours a day and buses extending in all directions. New york University is close to Chinatown, so it is convenient to buy food or have a toothache. It is almost impossible for USC to have a dormitory on campus, so it is necessary to live in a villa off campus, which is also a dormitory of the school. But outside the campus, the rent is very expensive, as cheap as 700 yuan a month, and I personally feel worried about safety. And new york University also has its own dormitory. If it is too expensive, you can also rent a Chinese house nearby, which is more than half cheaper. Both schools belong to noble schools, but I feel that Southern University is easier to enroll than new york University. I was admitted to Southern University, and new york University rejected me, but then I went to another cattle school. Therefore, my personal feeling is that the admission requirements of new york University are higher. Many children of princes and nobles from oil-producing countries in the Middle East come to new york University, which is located in the financial and commercial center of the century, showing a relatively high grade. There are many big companies in new york, and the corresponding employment opportunities are more than those in Los Angeles. However, Los Angeles also has advantages. The flight distance from China to new york is six or seven hours less than that of new york, and the time spent on the plane back home is six or seven hours less, and the air tickets are relatively cheap. Please tell me the rankings of two math majors, so that I can have an idea and give you further advice. I lived in new york for many years, and I also lived in LA for several months. The above is my personal opinion, for reference only.