Time flies, and in a blink of an eye, the three-year postgraduate study career is coming to an end. Looking back on this short and unforgettable study life, I feel a lot in my heart. Although the road ahead is not satisfactory, it will always remind me to forge ahead and dare not slack off.

Here, I want to thank my tutor Professor * *. After three years of study and life, Mr. * devoted himself to teaching. His profound knowledge, profound artistic accomplishment and rigorous academic attitude have deeply influenced me and pointed out the direction for my future scientific research and artistic growth. In the past three years, I was deeply impressed by his tireless pursuit and silent contribution to education. His tolerant mind and modest attitude inspired me to make constant efforts to become a qualified educator. Here, the students express their deepest gratitude.

Thanks to the leading teachers of * * College of * * University, I am growing every step with your earnest teaching and help.

Due to the limitation of level and time, many problems have not been developed and deepened in detail, which need to be expanded and improved in future study and work. For the shortcomings of the article, I urge all experts and teachers to criticize the axe.