In 2003, the score of College Entrance Examination 137 was already very high. In 2003, the average score of mathematics in most provinces and cities was less than 50, while that in Yunnan Province was only 36. This is the most difficult college entrance examination in 2 1 century. In this college entrance examination, many scholars scored 60 points in mathematics, which is not bad. This exam is the most difficult of all the college entrance examinations, because the questions given by experts are really difficult. At that time, many students cried out after the exam, which hit the confidence of many students to enter the university. This is why the number of college entrance examination students suddenly increased by one third in 2004. This time, the average score of mathematics is the lowest in history, and many math experts only have about 60 points, not to mention other students.