Sun, Sun speaks well. Sun holds a master's degree, engaged in banking and economist training, and has 6 years of education and training experience. In-depth research on teaching methods, teaching modes and thinking of lectures and examinations has served thousands of students and is well received by students. Xu Na is a senior teacher in economics and finance. Many years of first-line training experience, in-depth study of exams, accurate understanding of students' learning situation, and help students directly hit the test center, but the lecture efficiency is not high. So Sun speaks well.