Difficult. Official website of Southwest Petroleum University shows that the syllabus of 60 1 advanced mathematics in Southwest Petroleum University is more difficult than ordinary mathematics, and students of 60 1 advanced mathematics can only enter the class if they pass the exam. The main campus of Southwest Petroleum University is located in Chengdu, Sichuan Province, and consists of the Ministry of Education, Sichuan Province and China Petroleum and Natural Gas Corporation.