小金库

supplementary cash reserve / private fund / private hoard / slush fund

small / tiny / few / young

Xiaojin County (Tibetan: btsan lha rdzong) in Ngawa Tibetan and Qiang Autonomous Prefecture 阿壩藏族羌族自治州|阿坝藏族羌族自治州[A1 ba4 Zang4 zu2 Qiang1 zu2 Zi4 zhi4 zhou1], northwest Sichuan

surname Jin / surname Kim (Korean) / Jurchen Jin dynasty (1115-1234)

gold / chemical element Au / generic term for lustrous and ductile metals / money / golden / highly respected / one of the eight categories of ancient musical instruments 八音[ba1 yin1]

treasury

warehouse / storehouse / (file) library