https://www.youtube.com/watch?v=77ZozI0rw7w
https://www.youtube.com/watch?v=hlWiI4xVXKY
https://www.youtube.com/watch?v=1zKAz1vDDsc
https://www.youtube.com/watch?v=krKXXmnLQ80
https://www.youtube.com/watch?v=p29mwfzpNc4
https://www.youtube.com/watch?v=_U3oJdalhWE
https://www.youtube.com/watch?v=525VEeImynU
Future Steps:
1. more user testings
2. focus on the interface and user interaction design
3. continue to connect with professional resource