In fact, these two majors have relatively small spans and are very promising. Choosing one's postgraduate entrance examination means choosing hardship and loneliness. But as long as you work hard and persist, you will succeed. At that time, the success of your own efforts was the realization of your ideals. Now that you have chosen, you must share weal and woe. Don't look around, just keep working hard and keep moving forward. There must be a bright future ahead. Diligence, perseverance and confidence are your magic weapons for victory. See more, think more and learn more, and your efforts will be rewarded.