Not difficult. Mathematics in the senior high school entrance examination is about three years of junior high school knowledge. The math in grade seven is relatively simple, and so is the math in grade eight. Only the knowledge of quadratic function in the ninth grade is more difficult. In Mathematics 16 of Xinhua Senior High School Entrance Examination, some basic subjects need to be selected. Generally speaking, it is not difficult to learn the basic knowledge in mathematics 16 of Xinhua senior high school entrance examination.