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钻故纸堆
鑽故紙堆
zuāngùzhǐduī
1. to dig into piles of outdated writings (idiom); to study old books and papers

Character Breakdown

钻
zuān
diamond; to bore, to drill, to pierce
HSK 6 10 丶
故
gù
reason, cause; happening, instance
HSK 3 9 丶
纸
zhǐ
paper
HSK 2 7 丶
堆
duī
crowd, heap, pile, mass; to pile up; measure word for things in piles or stacks
HSK 5 11 丶

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