Tomorrow or the unexpected, you never know which one will come first. We always think that there will be many tomorrows, so much that we don't need to care about which day it will suddenly disappear, so we always squander it wantonly and ignore it with arrogance. However, when tomorrow becomes rare and becomes like a dry source, will you still treat it as before? When bad luck suddenly knocks on your door, will you face it bravely or run away cowardly?