"When earth piles up into mountains; wind and rain will originate thereof."
积土成山,汉语成语,拼音是jī tǔ chéng shān,意思是堆积的土多了可以成为山,比喻事业成功由点滴积累而来,积少成多,聚小成大。出自《荀子·劝学》。