Your major depends on your interest. Tongji Institute of Technology is good, Sichuan University is good at medicine, and Xiamen University is good at finance.
Employment depends on your major and your ability. Generally speaking, Tongji has an advantage because it is the most famous.
The school environment is very safe. I have been to Tongji once, which is very beautiful. After all, people's architecture is awesome. It is said that Xiamen University is also very smart. Go to official website to see pictures by yourself. Sichuan University doesn't understand.
If you live in the city, Tongji won't say anything in Shanghai. The largest development space and high consumption. Xiamen University is on the coast, not bad. Chengdu, where Sichuan University is located, is a very leisure city, with low cost of living and less pressure, which is also quite good, depending on your own preferences.
Generally speaking, if your college entrance examination score is high enough, report it to Tongji in Shanghai. After all, it is the most famous. When you graduate and look for a job, the employer will still pay more attention to your undergraduate school. Compared with Xiamen University and Sichuan University, Tongji Club has more advantages. As we all know, some people may clap bricks, and everything they say depends on their majors. After all, some schools are generally not well-known, but their majors are very strong. Should I choose a major or a school? How can I put it? I think the university is mainly on its own. No matter how weak the department in a famous university is, it won't be really that bad. If it is too bad, it will not be established. As long as you study hard, you will still be awesome.
I hope it will help you a little.