The land we live on accounts for only 30% of Earth's surface. It is so small that we never know whom we might meet in the next moment. Yet China, where we live, has 1,370,536,875 people. It is so vast that we never know who might disappear from our lives in the next moment.
In this world, both vast and small, there is always someone who leaves a mark deep in your heart, whether faint or profound. It is a mark left by time, called youth.
