Mongolian oak (Quercus dentata); see also 槲樹|槲树[hu2 shu4]

see 柞水縣|柞水县[Zha4 shui3 Xian4]

Zhashui, a county in Shangluo City 商洛市[Shang1 luo4 Shi4], Shaanxi

tussah silk