The answer to your question is as follows:

1, it is good to have a clear future orientation. As for the major of being an official, science and engineering used to be better. Now the country has a tendency to change to the liberal arts. After all, being an official also needs a theoretical basis. In western developed countries, officials are generally liberal arts, such as law, politics, economy and management. I think we can consider these professional directions. In addition, taking an examination of a famous university is also a way to reduce your own struggle. If you are a student in Tsinghua, take an active part in some clubs and student unions at school and strive to be the chairman, then you will be closer to your goal and will be easily reused after you come out.

As for books, I recommend you to read books about success, eloquence and interpersonal communication. If you want to be an official, you must be a good person and have a correct attitude.

The above two points are done, and you can stand on them without connections. I wish you can stick to it on the basis of clear direction. Only by sticking to your own ideals can you realize your own ideals. Never forget the ubiquitous ideal in life and get closer and closer to it. Step by step, you will find that you are getting closer and closer to it. Good luck!