They have given me insightful advice during my confirmation exam and academic writing. Many thanks to my friends, Chi Jianxing, Li Chen and Weining for their kindness, sense of humor, and endless emoticons; to my research partners, Ysa, Janelle, Jerrald, Andrew, Anita, and Shelly for their thoughtful advices and technical support; and to friend James' for his financial help without hesitation. Also, I have to say thank you to some special friends, Sheng Siong Supermarket, Bilibili, Xiami Music, my yoga mat and running shoes. Without their loyal company, I can hardly walk down this road. And to my family, thank you for loving me always, always. vi