Indeed, this subject has too much to learn, too much foundation to lay, too much time and energy to pay. Research is boring. As a theoretical researcher, if you want to make achievements, it means that all your energy should be devoted to your chosen professional field, and the research process is not as attractive as the results you expect. A monotonous experimental step must be repeated and repeated again and again, and the expectation time after time does not know when the results will appear, or even may There is no result, which requires researchers to have correct guiding ideology, experimental methods and keen thinking and observation ability.