From history of Bukhara’s glass and ceramics
In the medieval period, glass manufacture had rather complicated technology and developed mainly in cities. Archeological materials excavated on the territory of Bukhara contain significant sets of glass artifacts. From ancient times, our forefathers knew secrets of glass production and transferred them through generations. First evidences for glass production in Central Asia were found in the Chinese chronicle "Beishu" which informs that in 424 high - skilled glass - blowers coming from the domain of Yuichi-chi by means of rock mass melting manufactured colored glass that by properties overcame all things exported from "the west countries".
Further, the chronicle "Tanshu" informs that in 713 - 755 from Central Asia the glass works of red and green emerald colors were exported to China and highly valued in "under-sky empire". Central Asia, in particular, the southern lands of Uzbekistan, was not just a center of glass production but first brought this technology to the Chinese empire. Glass works both in the ancient times...