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| | China Philatelic Information---- World of Chinese Stamps and Philatelic Items |
 | | They introduced several scientists of ancient China, namely, Tsai Lun of East Han Dynasty (the inventor of paper-making process), Sun Si-miao of Tang Dynasty (Physician), Shen Kuo of Song Dynasty (Geologist), Guo Shou-jing of Yuan Dynasty (Astronomer). |
 | | Tsai Lun was a famouse scientist in East Han Dynasty. |
 | | On Novemer 21, 1997, on the auction during the " '97 second Coins and Stamps Expo, one C92 error of Tsai Lun, new triple-pairs, was sold at 61,000 RMB. |
| www.cpi.com.cn /cpi-e/valuable/xinzhongguo/7.asp (296 words) |
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