Preface
The Erlitou Site in Yanshi, Henan (c. 1750–1520 BCE, internationally recognized mid-to-late capital of the Xia Dynasty) and the Sanxingdui Site in Guanghan, Sichuan (c. 1600–1000 BCE, Ancient Shu Bronze Civilization) are two landmark archaeological sites of China’s Bronze Age. A large number of jade and bronze ritual artifacts unearthed at both sites share identical shapes, and their stratigraphic ages overlap significantly. However, handed-down ancient texts contain no complete records of ethnic migration or cultural inheritance between them. Six core controversial puzzles remain unsolved in global archaeology. This article is compiled based on peer-reviewed international papers and official excavation reports. All documents and artifact images are attached with accessible English overseas links for cross-verification by international researchers.
Mystery 1 No Empirical Evidence for the Transmission Route and Disseminators of Jade Zhang
Objective Archaeological Findings
The jade zhang unearthed at Erlitou is the earliest standardized royal ritual jadeware in East Asia, serving as the core symbolic artifact of Xia Culture.Modified jade zhangs were discovered in all No.1, 2 and 3 sacrificial pits of Sanxingdui.
Their overall outlines, bifurcated blades and basic decorative patterns are highly consistent with Erlitou prototypes, only supplemented with local relief carvings.
Radiocarbon dating proves Erlitou jade zhangs are more than 200 years older than Sanxingdui counterparts, confirming the Central Plains origin of the craft.
Unresolved Academic Questions
Prehistoric sites along the Qinling and Han River valleys yield no continuous settlements, jade workshops or semi-finished products, leaving an archaeological gap in the full migration corridor.
No stratigraphic evidence can confirm the disseminators: diplomatic missions, exiled royal clans or long-distance merchant caravans remain unproven.
Ancient Shu fully retained the Central Plains royal ritual jadeware yet independently remodeled its decorations, lacking a complete archaeological chain to explain its cultural absorption mechanism.
Overseas English Academic Links
1. Cambridge University Press Antiquityhttps://www.cambridge.org/core/journals/antiquity/article/new-discoveries-at-the-sanxingdui-bronze-age-site-in-southwest-china/D96494368471CF7CBA817690CDCA5A75
2. Nanzan University Japanese-English archaeological paperhttps://nanzan-u.repo.nii.ac.jp/record/3139/files/acajinshi21_04_nishie_kiyotaka.pdf
Overseas HD Artifact Gallery Links
1. Erlitou Original Jade Zhang (Wikimedia Commons)https://commons.m.wikimedia.org/wiki/File:Erlitou_jade_zhang.jpg
2. Modified Sanxingdui Jade Zhang (Hong Kong Palace Museum English Site)https://www.hkpm.org.hk/en/visit/audio-guide/g8-gazing-at-sanxingdui
Mystery 2 Untraced Origin of Sanxingdui’s Advanced Bronze Metallurgy
Objective Archaeological Findings
The bronze sacred tree and vertical-eye masks adopt sectional casting and high-temperature brazing, with joint gaps narrower than 0.1 mm, which cannot be fully reproduced by modern laboratories
The bronze alloy contains trace unique metals absent in Shang and Zhou bronze wares of the same period.
Erlitou bronze workshops only yielded simple clay molds, with no relics of precise layered welding.
Unresolved Academic Questions
No archaeological evidence reveals how Ancient Shu ancestors acquired advanced metallurgical techniques.
An obvious technological gap exists between the two sites, with no transitional molds or smelting semi-finished artifacts unearthed.
High-precision craftsmanship was only applied to large sacrificial wares while daily bronze tools were crudely made; the reason for such hierarchical use remains unknown.
Overseas English Academic Link
1. npj Heritage Science (Nature Portfolio)https://www.nature.com/articles/s43520-025-00217-9
2. Frontiers in Earth Sciencehttps://public-pages-files-2025.frontiersin.org/journals/earth-science/articles/10.3389/feart.2024.1489898/pdf
Overseas HD Artifact Gallery Links
1. CT Scan of Bronze Sacred Treehttps://sanxingduiruins.com/artifact-bronze-tree
2. Giant Vertical-eye Bronze Mask (Wikimedia Commons)https://commons.m.wikimedia.org/wiki/File:Shang_bronze_mask.jpg
Mystery 3 No Consensus on the Standardized Destruction & Burial of Sacrificial Pit Artifacts
Objective Archaeological Finding
All eight sacrificial pits follow a standardized process: manually split large ritual wares → incinerate off-site → bury in layers of rammed earth.
No large-scale high-temperature burnt layers on pit walls; ashes were transported from outside instead of on-site fire sacrifice.
Stratigraphy bears no traces of war trampling or flood impact, ruling out destruction by conflicts or natural disasters.
Three Main Academic Hypotheses All Have Critical Flaws
Ritual Destruction after Dynastic Transition: Fails to explain the ritualized layered burial pattern.
Periodic Grand Sacrifice: Contradicts stratigraphic evidence of no on-site burning.
Relocation & Sealing of Ritual Vessels: Layers proving large-scale capital migration are absent.
Overseas English Academic Links
1. ARCHAEOLOGY Magazinehttps://archaeology.org/issues/november-december-2024/features/the-many-faces-of-the-kingdom-of-shu/
2. Official English Sanxingdui Research Portalhttps://sanxingduiruins.com/history/historical-perspectives-sanxingdui-legacy
Mystery 4 Unknown Function & Connection of Man-made Underground Cavities at Two Sites
Objective Archaeological Findings
Drilling under Erlitou palace foundations uncovered a huge man-made underground cavity, which has not been fully excavated.
The sacrificial pits of Sanxingdui connect to a hundred-meter-scale artificially carved underground space.
The construction age of both cavities coincides with Xia Culture strata.
Unresolved Academic Questions
Whether the two underground spaces belong to one integrated ancient supporting project is unconfirmed
No consensus on the original function: storage, underground ritual venue or special geostructural project.
It is unclear if an integrated cross-regional design links the underground structures of both sites.
Overseas English Academic Link
PMC Open Access Microbiological & Stratigraphic Researchhttps://pmc.ncbi.nlm.nih.gov/articles/PMC11666563/pdf/fmicb-15-1489025.pdf
Mystery 5 Complete Records of Xia Migration from Central Plains to Ancient Shu Are Absent in Ancient Texts
Objective Archaeological Findings
Physical evidence from jadeware, metallurgy and rituals jointly prove Xia clans migrated from the Central Plains to Bashu.
Ancient texts such as Records of the Grand Historian and Book of Documents only briefly mention Ancient Shu, without full migration accounts.
Surviving written records contain no documentation of the subordinate relationship between the Xia capital Erlitou and Ancient Shu.
Unresolved Academic Question
The real motivation for later historians to systematically erase this period of history remains unclear.
Why Ancient Shu voluntarily cut off the written cultural inheritance from the Central Plains.
How rituals and craftsmanship were stably passed down for centuries without written records.
Overseas English Academic Links
JSTOR The Cambridge History of Ancient Chinahttps://www.jstor.org/stable/24442876
Mystery 6 Absence of a Complete Ancient Shu Writing System Blocks Proof of Cultural Inheritance
Objective Archaeological Findings
Carved symbols unearthed at Erlitou show the embryonic form of early writing.
Only scattered isolated marks exist on Sanxingdui artifacts, without a continuous writing system capable of forming full texts.
No long inscriptions have been excavated, making it impossible to verify the cultural lineage between the two sites through written records.
Unresolved Academic Questions
The fundamental reason why Ancient Shu abandoned the Xia writing system from the Central Plains.
Whether scattered marks on artifacts are simplified versions of Xia carved symbols.
The underlying logic for long-term stable inheritance of rituals and craftsmanship across thousands of miles without written records.
General Closing Note
This article is purely objective archaeological popular science, free of novels or fantasy derivatives, only presenting excavated evidence and academic debates.All external links lead to overseas academic journals, international museums and open-source image libraries, accessible without barriers for overseas networks.
Standard international archaeological terminology and plain concise sentences are adopted throughout the text, suitable for machine or human translation, bilingual official websites, overseas popular science brochures and foreign book appendices.
Core Bilingual Archaeological Glossary
1. Erlitou Site
2. Sanxingdui Site
3. Ancient Shu Civilization
4. Xia Culture
5. jade zhang ritual blade
6. sacrificial pit
7. radiocarbon dating
8. stratigraphy
9. rammed earth
10. sectional casting
11. brazing
12. homologous artifacts
13. cross-cultural transmission
14. stratigraphic evidence