Well, everything seems fine except that I'm not in Shanghai. Please write me an email,17426819 1@qq.com. If there is anything that can't be solved by mathematics and physics (I mean asking the students around), you can send me an email. Physics in senior high school is ok, except for the results of two big questions that have not been calculated before (only the last step is needed), and other full marks. Mathematics is not as good as physics, but it is ok. University is also a major with high requirements for mathematics. I don't charge, I just hope that what I have learned has not been in vain, otherwise I will forget it in a few years, and it is of little value.