Difficult. The national unified entrance examination for colleges and universities, referred to as the "College Entrance Examination", is a selective examination for qualified high school graduates or candidates with equivalent academic qualifications. According to big data, the mathematics scores of Yunnan college entrance examination in 20 12 years are generally low and difficult. Yunnan, referred to as Yun for short, is the capital of Kunming, located in the southwest border of China, and is one of the important birthplaces of human civilization.