Before this trip, I had been to many places already including England for 20 days, Japan for 4 times, Vietnam, Australia, Hong Kong, China, and so on. When I was 18 years old, I had been to Stanford for its summer program, where I took classes and also travelled around after the program. The cities I had been to at that time includes San Francisco, Los Angeles, Las Vegas, Yosemite National Park, etc. Since I had also travelled in Hawaii with my family last year, this trip would be my third time in United States.