最后我要衷心感谢所有在整个博士课程中教过我的教授，从他们那里，我得到了

Finally, I would like to sincerely thank all the professors who have taught me in the entire Ph.D. program. From them, I have received valuable academic research support and thank them for all of my valuable suggestions. I sincerely hope that they will be happy forever. Thanks to my family for their support for my study and for their spiritual encouragement. Without their support, I would not have come to Korea to complete my Ph.D. study. This learning experience in Korea is a valuable asset in my life. Although the process is bitter, but the harvest is full and fruitful, unforgettable for a lifetime!

Finally, I would like to sincerely thank all the professors who have taught me in the whole doctoral program. From them, I have received valuable support from academic research and thank them for their valuable suggestions on all this. I sincerely hope they will be happy forever. Thank my family for their support for my study and encouragement to my spirit. Without their support, I could not come to Korea to complete my doctoral study. This learning experience in Korea is a valuable asset in my life. Although the process is hard, but the harvest is full, fruitful and unforgettable!

Finally, I would like to sincerely thank all the professors who have taught me in the whole doctoral course. From them, I have received valuable support from academic research, and thank them for their valuable advice on all this. I sincerely hope that they will be happy forever. Thanks to my family's support for my study and encouragement to my spirit, without their support, I couldn't have come to Korea to complete my doctoral studies. This study experience in Korea is a valuable asset in my life. Although the process is bitter, the harvest is full, fruitful and unforgettable!