故纸堆 (故紙堆) gùzhǐduī

gùzhǐduī noun a pile of old books
Domain: Modern Chinese 现代汉语
Notes: (CC-CEDICT '故紙堆')

Contained in

• 钻故纸堆(鑽故紙堆) to dig into piles of outdated writings; to study old books and papers