What is the significance of the 20th birthday?

The significance of the 20th birthday. . .

It's hard to imagine. I should say I didn't realize it at all. In this way, the second 10 year in your life has passed quietly, if life is a drawing board; The first decade was a picture composed of light colors, full of happiness, but lacking memories because of youth. The second decade, like a watercolor painting with alternating shades, is full of special feelings about life in the flower season and the rainy season. Joy is mixed with sadness, and immaturity occasionally brings out some maturity, which everyone understands but no one can accurately describe. Can't resist the shuttle of time. In a blink of an eye, what will it be like to reluctantly enter the third decade? Looking forward to it. . .