钻故纸堆 Save Sign in to save words Traditional (Taiwan): 鑽故紙堆 zuāngùzhǐduī ㄗㄨㄢ ㄍㄨˋ ㄓˇ ㄉㄨㄟ to dig into piles of outdated writings (idiom) to study old books and papers Character by character 钻(zuān)drill 故(gù)happening 纸(zhǐ)paper 堆(duī)pile up A Chinese word or character, or English Search Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0