I would like to express my gratitude to all those who have guided me through this challenging and rewarding journey. Particularly, I would like to express my sincere gratitude to my dissertation supervisor, Mr. Mark Billings, for his patience and valuable advices, suggestions and comments all the way through this research. Also, I would like to thank my friend, David Dai, who acted as the second analyst in my content analysis. He helped me to collect the primary data and conduct the research successfully. Last but by no means least, I would like to take this opportunity to extend my deep gratitude to my beloved family, for their continuously support and encouragement not only during my Master studies, but throughout my whole stay in the UK