Individual itineraries and the circulation of scientific and technical knowledge in East Asia (16th–20th centuries)

Kangxi describes the chake tree, often found in the Hanhai (Gobi Desert) region

Kangxi mentions shells frequently found in the Hanhai desert, as evidence that it was once covered in water, in Ji xia ge wu bian

Kangxi mentions mirages 海市 that can be seen in the spring and autumn in the Hanhai desert.

Kangxi picked up stones in the Gobi Desert during the campaign against the Oirats.

Kangxi discusses the "thunder wedges" found in the Hanhai, comparing them to thos found in the Shengjing & Ula regions.