雨后春笋 (雨後春筍) yǔ hòu chūn sǔn

yǔ hòu chūn sǔn set phrase after rain, the spring bamboo; rapid new growth
Domain: Idiom 成语
Notes: (CC-CEDICT '雨後春筍'; CCI '雨后春笋', pp. 98-99; Guoyu '雨後春筍')