As far as personal development is concerned, compared with engineering, such as energy and power, social sciences, such as economics and finance, the future of basic disciplines is not good.
3. Your basic knowledge of scientific mathematics is not bad, so you can consider giving full play to this specialty and taking relevant engineering or financial accounting exams.
There are many excellent engineering schools, such as Tsinghua, Shanghai Jiaotong University, Harbin Institute of Technology, Xi Jiaotong University, Huake University, Tianjin University, Chongqing University, Tongji University, Dalian University of Technology and so on.
5. Good economic schools: Shanghai University of Finance and Economics, Southwestern University of Finance and Economics, People's Congress, Wuda University, Xiamen University, Fudan University, Cai Zhong.
6, in no particular order, no one is more detailed than me, there are still questions to ask, hope to give points.