Have you ever been surprised after looking at your face in the mirror? Either yes or no, what I know is that there could be two reasons. One, your skin looked totally fresh; two, your skin looked absolutely stressed. Some days, you feel like you’ve made the Earth a more beautiful world; some days, you feel like a poor trash bin along the streets. Some days, you just want to bury yourself under your sheets; some days you’re too confident to hide.