Fingerprints in Clay Reveal Women and Teenagers Helped Build China’s Terracotta Army

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A Surprising Signature in the Clay

For decades, the thousands of life-size warriors buried near the tomb of China's first emperor, Qin Shi Huang, were assumed to be the work of adult male craftsmen. A study published on October 13 in the Journal of Cultural Heritage challenges that picture. The Emperor Qinshihuang's Mausoleum Site Museum and Shandong University later publicized the findings.

The evidence is small but personal. While shaping the soft clay, ancient workers left fingerprints that survived underground for over two millennia. According to the researchers, this is the first quantitative biological evidence of a more diverse workforce.

What the Researchers Found

The team analyzed 79 usable fingerprints from figures in Pit 1, one section of the vast burial complex. Reports differ on how many figures were examined (see the notes below).

The method rests on a simple fact. The spacing between the ridges of a fingerprint grows as a child grows, and it also differs on average between men and women. Using a statistical technique called a Bayesian mixture model (a method that estimates the most likely category for each print), the team sorted the prints by estimated age and sex.

The estimated breakdown:

• Adult men: about 45 percent of the prints
• Adult women: about 32.7 percent
• Teenagers under 15: about 22.3 percent

Most prints were found on prefabricated parts such as heads, arms and armor. This fits the long-accepted view that the figures were made in pieces from molds and then assembled.

Why Teenagers Are Not a Surprise

The share of young people also matches what historians know about the Qin period. Written records describe an apprentice system in which youths assisted master craftsmen. Legal texts from the era indicate that women took part in state labor projects as well.

The age pattern is notable too. Prints from adult men and women peaked around age 20, suggesting a workforce of young adults working alongside teenage helpers.

Important Limits of the Study

The authors are cautious, and readers should be too. The percentages describe fingerprints, not people. One worker could leave many prints, so the figures do not show how many men, women or teenagers actually took part.

Other limits include:

• The sample comes from a single area of Pit 1 and may not represent the whole site.
• The method relies on modern reference data, so differences between ancient and modern populations could skew the estimates.
• The authors warn that their approach may overstate the role of women and children.
• The prints cannot show who held which job or how tasks were divided.

Background: A Monument Built by the State

The Terracotta Army was buried with Qin Shi Huang after his death in 210 BC. It is part of a mausoleum complex that the Qin state organized on an enormous scale, and the site has been a UNESCO World Heritage site since 1987.

The study's own authors describe the mausoleum as a showcase of the empire's ability to run huge building projects, including labor distribution and standardized production. Fingerprints now add a human face to that picture. They remind us that behind a ruler's monument stood ordinary people, many of them young.

Outlook

The researchers say this work is a foundation, not a final answer. A larger fingerprint database from other pits, such as Pit 2, could show whether the pattern holds across the whole site or only in one corner of it.

Earlier work points the same way. In 2022, Chinese researchers reported fingerprints on a painted figure that resembled those of a teenager. If wider sampling confirms the trend, the story of the Terracotta Army will have to be told with many more hands.

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Sources

1. South China Morning Post – "Terracotta warriors were mainly built by women and children, batch fingerprints show": https://scmp.com/news/china/science/article/3371607/terracotta-warriors-could-be-mainly-built-women-and-children-batch-fingerprints-show
2. ScienceAlert – "2,200-Year-Old Fingerprints Reveal Who Really Built China's Mysterious Terracotta Army": https://www.sciencealert.com/2200-year-old-fingerprints-reveal-who-really-built-chinas-mysterious-terracotta-army
3. Ancient Origins – "Ancient Fingerprints Rewrite Who Crafted China's Terracotta Army": https://www.ancient-origins.net/news-history-archaeology/terracotta-army-makers-00103280
4. Greek Reporter – "2,200-Year-Old Fingerprints Reveal Who Built China's Terracotta Army": https://greekreporter.com/2026/10/19/fingerprints-china-terracotta-army/
5. CGTN – "New discoveries from the Mausoleum of the first Qin Emperor" (2022): https://news.cgtn.com/news/2022-07-22/New-discoveries-from-the-Mausoleum-of-the-first-Qin-Emperor-1bQuWCKct9u/share_amp.html

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