I am a graduate student majoring in petroleum engineering at China Youshi University (East China). Our main majors are petroleum engineering, geology, exploration, chemical engineering, storage and transportation, etc. These majors are the key supporting majors of the school. Other majors, such as mathematics, English and humanities, are poorly paid and it is difficult to find a job. If you are interested in going to petroleum university, you can consider cross-disciplinary examination and research. Even graduate students majoring in mathematics in petroleum university can hardly find jobs.