寶庫 Simplified: 宝库 On the HSK 7-9 vocabulary list, at CEFR level C2. bǎokù ㄅㄠˇ ㄎㄨˋ treasure-house treasury treasure-trove (often fig., book of treasured wisdom) Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0 国际中文教育中文水平等级标准, 中华人民共和国教育部, MIT