A terminal oasis where the Heihe River dies into the Badain Jaran Desert — the Han dynasty's extreme northern outpost, where military wooden slips were unearthed, a forward server of the Qin-Han empire in the Gobi.

A terminal oasis where the Heihe River dies into the Badain Jaran Desert — the Han dynasty's extreme northern outpost, where military wooden slips were unearthed, a forward server of the Qin-Han empire in the Gobi.