Zhao Youqin: Quick Facts
Facts
| Also Known As | Chao Yu-ch’in |
|---|---|
| Born | July 26, 1271 • China |
| Died | c.1335 • China |
| Notable Works | “Gexiang xinshu” • “Xian Fo tongyuan” |
| Subjects Of Study | pi • camera obscura |
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