India. Or, the funny moments I had with Nannan especially when she couldn't control herself laughing at my terrible Chinese accent. I'd like to remember Shabnam, Pari, Narges, Shayan, and all my precious Iranian friends with the brightest moments they gifted to me over last two years. Thanks to my great friends Ying, Kia Yan, Long Dong, Jang Tao, Ghim Eng, and Angela, who made our ERLab a lovely environment plenty of friendship and happiness. Last but not least, I give my special thanks to my lovely parents for their kind supports. I don't have words to acknowledge Elham and Alireza for their endless support and boundless wisdom. They have been my strength, my criticism, my motivator and also my best friends.