What's behind the idiom Spring Rain beginning of spring?

Like mushrooms after rain, y ǔ Hou Qin s ǔ n

[Interpretation] After the spring rain; Bamboo shoots grow faster and faster. Metaphor the emergence and vigorous development of new things.

[Language] Lei Keshan Collection: "The barren forest is full of spring rain; New bamboo shoots and dragons. "

The mountains are dotted with stars, and there are a dime a dozen everywhere.

[Antisense] It is rare. Niu Yi Mao's only surviving remains.

[Usage] Used as a compliment. Metaphor is the rapid development of new things. Generally used as attribute and object.

[structure] is more formal.

[Example] In our hometown; Brand-new peasant residence; Like ~; Break through the ground.