This is a post talking about the recent changes of my life. I switched courses from Pure Maths to Pure Mechanical Engineering. Although I had to waste one year doing so, but I would rather waste one year learning something new and applicable rather than four years doing outdated stuffs that would not add value to me. Realising it late is indeed painful and time-consuming but I take it as an expensive lesson that cost a year to learn how to always self-reflect from time to time with clarity.