数学中最重要的是理解概念，而不仅仅是记忆公式。
User needs are both the starting point and the ultimate goal of product development.
"The world is full of stories, but the ones that matter most are the ones we tell ourselves."
To make something good， just do it. To make something great， just re-do it， re-do it， re-do it. The secret to making fine things is in remaking them.
Change your thoughts and you change your world.