Famous tutor for postgraduate entrance examination and CET-4 and CET-6, who has been engaged in English testing research and teaching for a long time, has published a large number of papers on English teaching and learning in various professional magazines at home and abroad. He is a rare English tutor for postgraduate entrance examination. His lectures are clear-headed, coherent and logical, and he tries to help students easily grasp the true meaning of English learning in the most effective time. Teacher Liu is deeply loved by students for her fashionable, unique and sharp teaching style.