In 1992 REPUBLIC OF CHINA (Taiwan) issued a commemorative stamp marking the 400th Anniversary of the Birth of Johann Adam Schall von Bell (known as Tāng Ruòwàng in China), a German Jesuit, astronomer, and advisor to the Qing dynasty's Shunzhi Emperor.
Schall von Bell played a significant role in reforming the Chinese calendar and was appointed Director of the Imperial Observatory and the Tribunal of Mathematics.

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