🇨🇳 China · Hydraulic works
Turpan Karez (Kariz) Irrigation System — Turfan Depression
Han to Qing (2nd c. BCE – 19th c. CE) · Han Chinese, Turkic Uyghur, Gaochang Tokharian, Hui
Tianshan 5,000-km 1784-karez gravity snow-melt system below sea level Han–present.