Johann Adam Schall von Bell
The telescope was introduced to China in the early seventeenth century. The telescope was first mentioned in Chinese writing by Manuel Dias the Younger (Yang Manuo), who wrote his "Tian Wen Lüe" in 1615. In 1626, Johann Adam Schall von Bell (Tang Ruowang) published the Chinese treatise on the telescope known as the "Yuan Jing Shuo" ("The Far-Seeing Optic Glass"). The Chongzhen Emperor (1627–1644) of the Ming dynasty acquired the telescope of Johannes Terrentius (or Johann Schreck; Deng Yu-han) in 1634, ten years before the collapse of the Ming Dynasty. However, the impact on Chinese astronomy was limited.