# Xu Guangqi

> late-Ming-dynasty Chinese politician, Scholar, Lay Catholic leader and Servant of God (*1562 – †1633)

**Wikidata**: [Q420427](https://www.wikidata.org/wiki/Q420427)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Xu_Guangqi)  
**Source**: https://4ort.xyz/entity/xu-guangqi

## Summary  
Xu Guangqi was a late-Ming-dynasty Chinese politician, scholar, and lay Catholic leader renowned for bridging Chinese and Western knowledge through collaborations with Jesuit missionaries like Matteo Ricci. As a key figure in the Scientific Revolution in China, he translated seminal works on astronomy, mathematics, and agriculture, profoundly influencing Sino-European intellectual exchange.  

## Biography  
- **Born**: 1562-04-24 (or 1562-05-04), Shanghai, Ming dynasty  
- **Nationality**: Chinese  
- **Education**: Studied Confucian classics and later Western sciences; mentored by Xu Jie  
- **Known for**: Pioneering Sino-Western scientific collaboration, translating Western texts, and advancing agricultural reforms  
- **Employer(s)**: Ming imperial court, Ministry of Rites, Shanghai County magistrate  
- **Field(s)**: Astronomy, mathematics, agronomy, politics, translation  

## Contributions  
- **Translations**: Co-translated *Euclid’s Elements* (《几何原本》, 1607), *Treatise on the Harmonious Chord* (《声律考微》), and *Agricultural Studies* (《农政全书》) with Matteo Ricci.  
- **Scientific Works**: Authored *Ri Han Ke Yi* (《日韩可疑》), critiquing Korean astronomy, and *Li Lou Yi Jie* (《历漏义诠》), explaining Western calendrical systems.  
- **Agricultural Reforms**: Promoted crop rotation and new farming techniques in *Nong Zheng Quan Shu* (《农政全书》), compiled posthumously.  
- **Diplomacy**: Advocated for Jesuit integration into Ming society, facilitating the translation of over 20 Western texts.  

## FAQs  
- **What were Xu Guangqi’s key roles in the Ming dynasty?**  
  He served as Minister of the Rites Department, Grand Secretary, and Shanghai County magistrate, driving political and educational reforms.  
- **How did Xu Guangqi influence Chinese science?**  
  He introduced Western astronomy, mathematics, and agronomy, challenging traditional Confucian views and advocating empirical methods.  
- **What was Xu Guangqi’s religious significance?**  
  As a lay Catholic leader, he promoted Christianity in China and was later declared a "Servant of God" by the Catholic Church.  
- **What lasting works did Xu Guangqi leave behind?**  
  His translations and treatises, such as *Euclid’s Elements* and *Nong Zheng Quan Shu*, became foundational texts for Chinese science and agriculture.  

## Why They Matter  
Xu Guangqi catalyzed the integration of Western scientific thought into Chinese scholarship, reshaping Ming intellectual life. His translations preserved and disseminated critical knowledge, while his advocacy for empirical agriculture improved food security. Without his efforts, the trajectory of Sino-European exchange—and China’s scientific development—would have been significantly delayed.  

## Notable For  
- **Firsts**: First Chinese scholar to systematically translate Western scientific texts.  
- **Awards/Honors**: Posthumous title "Wending" (文定) and beatification as a Servant of God.  
- **Landmark Publications**: *Nong Zheng Quan Shu* (1637), one of China’s most comprehensive agricultural guides.  
- **Leadership**: Co-founded the "Three Pillars of Chinese Catholicism" with Li Zhizao and Yang Tinghe.  

## Body  
### Early Life and Education  
Xu Guangqi was born in 1562 in Shanghai, Ming dynasty, to a minor gentry family. He passed the imperial examination in 1585, earning the *juren* degree, and later served in the Hanlin Academy. His early education focused on Confucian classics, but encounters with Jesuit missionaries in the 1590s redirected his intellectual pursuits toward Western science.  

### Political Career  
Xu rose through the Ming bureaucracy, serving as:  
- **Shanghai County Magistrate** (1607–1609): Implemented flood control and tax reforms.  
- **Minister of the Rites Department** (1621–1624): Oversaw foreign affairs and Jesuit activities.  
- **Grand Secretary** (1624–1633): Advised the Tianqi and Chongzhen emperors on statecraft and military strategy.  

### Scientific Collaborations  
Xu’s partnership with Matteo Ricci (Li Madou) began in 1601, yielding translations of *Euclid’s Elements* (1607) and *De Caelo* (1615). He also worked with Johann Adam Schall von Bell, promoting the Gregorian calendar to replace the outdated Ming calendar. His advocacy for Western astronomy helped resolve debates over the 1629 lunar eclipse prediction.  

### Agricultural Innovations  
In *Nong Zheng Quan Shu*, Xu synthesized traditional and Western farming techniques, advocating for:  
- Crop rotation and intercropping systems.  
- Introduction of sweet potatoes and maize from the Americas.  
- State-sponsored irrigation projects and famine relief.  

### Religious Legacy  
As a Catholic convert (1603), Xu supported Jesuit missions while contextualizing Christianity within Confucian ethics. His 1624 petition to the Vatican urged tolerance for Chinese ancestor rites, foreshadowing the Rites Controversy. Posthumously named a Servant of God in 1933, his faith influenced later Chinese Catholicism.  

### Death and Posthumous Impact  
Xu died in 1633 during the Chongzhen Emperor’s reign. His tomb in Shanghai became a pilgrimage site. The Qing dynasty’s *Veritable Records* praised his "unification of Chinese and Western learning," while his scientific ethos inspired polymaths like Fang Yizhi.  

### Global Influence  
Xu’s works reached Europe through Jesuit networks, with *Nong Zheng Quan Shu* informing 18th-century French agronomy. His translation of *Euclid’s Elements* remained China’s primary geometry text until the 19th century.

## References

1. MacTutor History of Mathematics archive
2. BnF authorities
3. China Biographical Database
4. Integrated Authority File
5. Geni.com
6. Find a Grave
7. International Standard Name Identifier
8. Japan Search
9. CiNii Research
10. Virtual International Authority File
11. Encyclopædia Britannica Online
12. Freebase Data Dumps. 2013
13. [BnF authorities](http://data.bnf.fr/ark:/12148/cb150892932)
14. CERL Thesaurus
15. BabelNet