What do you mean, "a cup is too shallow, two pounds of peach blossoms? How can you beat him if you come late and rush?"

The literal meaning of these two sentences is: the glass is too shallow, just like our feelings are not deep enough, and there is no chance to have a bright future; The alley is too short, suggesting that the fate is too shallow, and we will separate as soon as we meet.

Extension means that we know each other by fate, but we don't have a chance to be together. Close friends and lovers will always be separated together, expressing feelings of loneliness and injury. At the same time, I also see through the friendship in this world, that is, to get rid of difficulties and get together again, and then go their separate ways.

The original content is: the glass is too shallow to respect the future;

The alley is too short for white hair to walk;

Two pounds of peach blossoms make wine, and ten thousand cups are not as gentle as you;

A piece of paper is too short to tell a story;

Life is too short to last until the end of time.

Personal understanding:

These two sentences show that friendship in this world is to share weal and woe, never leave, go their separate ways and cherish each other.

In other words, no matter friendship or love, it will come to an end, and sometimes it will end before it starts. There is no "long way to go" and no white-haired lover to accompany. Fate has arrived, take care of each other.