Lin Jing, a former New Oriental researcher, has been engaged in junior high school mathematics teaching for many years. Now, New Oriental headquarters is engaged in junior high school mathematics teaching and research. He is meticulous in solving problems, pays attention to skills, is easy to learn and use, and is well received. He has compiled books such as Junior High School Mathematics Training Course (Grade 7), Junior High School Mathematics Training Course (Grade 8), Junior High School Mathematics Training Course (Grade 9), and Strategy for Solving Problems at the Finale of Senior High School Entrance Examination! Gao Haiyang, a former teacher and researcher, has been engaged in junior high school mathematics teaching for many years. He is an S-class teacher trained by the headquarters. He likes to study hard, is good at summing up, and has a good grasp of the direction of mathematics propositions in the senior high school entrance examination. He has compiled books such as Junior High School Mathematics Training Course (Grade 7), Junior High School Mathematics Training Course (Grade 8), Junior High School Mathematics Training Course (Grade 9), and Solving Strategies for the Finale of Senior High School Entrance Examination.