202 1 has the lowest mathematical difficulty. 202 1 Math II is the simplest in the past years, and most of the problems are basic. Students with a good foundation will have no difficulty in getting 130+, and Taylor formula and Lagrange mean value theorem, which are the most difficult in high numbers, have not been tested, and the big problem of line generation is almost useless. According to the law that it is difficult to count two in 2022, it will be more difficult to count two in 2020, and new knowledge points will be added to the outline reform.