The telescope was introduced to China in the early 17th century. The telescope was first mentioned in Chinese writing by Emanuel Diaz (Yang MaNuo), who wrote his Tian Wen Lüe in 1615.[25] In 1626, Adam Schall von Bell (Tang Ruowang) published the Chinese treatise on the telescope known as the Yuan Jing Shuo (The Far-Seeing Optic Glass).[26] The Chongzhen Emperor (明思宗, 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.[25] However, the impact on Chinese astronomy was limited.