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Shimao and the Huangchengtai platform

Location	Shenmu, northern Shaanxi, on the Loess Plateau, China
Conventional date	Walled city c. 2300–1800 BCE; stepped platform about 70 m high.
Alternative date proposals	None with significant published support that we know of.
What is measured	Stepped platform with carved stone reliefs in its retaining walls; city flourished by about 2000 BCE. [1][2] Latest excavation report published October 2026. [3]

Shimao overturned the idea that Chinese civilisation began only in the Central Plains. Its terraced pyramid core is one of the largest early monuments in East Asia.

Claims about this site

Claim	Status	Verdict
Pyramids around the world point to a common lost source	Leading Edge	Open question

Sources

Jaang, L. et al. (2018). When peripheries were centres: a preliminary study of the Shimao-centred polity in the loess highland, China. Antiquity 92. doi:10.15184/aqy.2018.31 data
Shaanxi Provincial Institute of Archaeology et al. (2021). The grand platform of Huangchengtai at Shimao site in Shenmu, Shaanxi. Chinese Archaeology 21. doi:10.1515/char-2021-0003 data
Rawson, J. et al. (2026). Excavations of the city of Shimao and its monuments. Antiquity (21 Oct 2026). doi:10.15184/aqy.2026.10458 data

Dates are summarised in our own words from the sources listed. Conventional and alternative dates are both reported; "measured" lists only dated or documented findings. Methodology.