Time flies, which means time passes too fast. Time passed in the blink of an eye. Sun-Moon Shuttle is an instrument used to draw weft when weaving. It has two sharp ends and a thick middle, and the tow is placed in the hollow part. When weaving, the shuttle runs back and forth very fast, so it is often used to describe the appearance of extremely fast speed. For example, "shuttle" refers to frequent exchanges, and "throwing shuttle" refers to how fast time passes. time flies

Represents the passage of time, just like the speed of shuttle alternating operation, extremely fast.