of Korean, Crimean Tatar, and some Ming dynasty (1368–1644) bows. String bridges are not present in artwork in the time of Genghis Khan or before. Modern living traditions of composite bows All Eurasian composite bows derive from the same nomad origins, but every culture that used them has made its own adaptations to the basic design. The Turkish, Mongolian, and Korean bows were standardized when archery lost its military function and became a popular sport. Recent Turkish bows are optimized for flight shooting. Perso-Parthian bow The Perso-Parthian bow is a symmetric recurve under high tension when strung. The "arms" of the bow are supposed to reflex far enough to cross each other when the bow is unstrung. The finished bow is covered by bark, fine leather, or in some cases shark skin to keep out moisture. Perso-Parthian bows were in use as late as the 1820s in Persia (ancient Iran). They were then replaced by muskets. Turkish bow This is the Ottoman development of the composite bow, presumably brought from the steppes. Turkish bows evolved, after the decline of military archery, into probably the best traditional flight bows. Their decoration often included delicate and beautiful multicoloured designs with gold. Chinese bow For millennia, archery has played a pivotal role in Chinese history. Because the cultures associated with Chinese society spanned a wide geography and time range, the techniques and equipment associated with Chinese archery are diverse. Historical sources and archaeological evidence suggest that a variety of bow designs existed throughout Chinese history. For much of the 20th century, only a few Chinese traditional bow and arrow-making workshops were active. However, in the beginning of the 21st century, there has been a revival in interest among craftsmen looking to construct bows and arrows in the traditional Chinese style. Mongol bow The Mongolian tradition of archery is attested by an inscription on a stone stele that was found near Nerchinsk in Siberia: "While Genghis Khan was holding an assembly of Mongolian dignitaries, after his conquest of Sartaul (Khwarezm), Yesüngge (the son of Genghis Khan's younger brother) shot a target at 335 alds (536 m)". The Mongol bowmaking tradition was lost under the Qing, who heavily restricted archery practice; only practice with blunt arrows at shorted distances was allowed while most other forms of practice, including mounted archery; was forbidden. The present bowmaking tradition emerged after independence in 1921 and is based on