The relics found near Kashgar, the most western of these cities, are comparatively few, probably because its position exposed it to the destructive influence of Islam at an early date. Chinese writers reproduce the name as Ch'ia-sha, Chieh-ch'a, etc., but also call the region Su-lê, Shu-lê, or Sha-lê[491]. It is mentioned first in the Han annals. After the missions of Chang-Ch'ien trade with Bactria and Sogdiana grew rapidly and Kashgar which was a convenient emporium became a Chinese protected state in the first century B.C. But when the hold of China relaxed about the time of the Christian era it was subdued by the neighbouring kingdom of Khotan. The conquests of Pan-Ch'ao restored Chinese supremacy but early in the second century the Yüeh-chih interfered in the politics of Kashgar and placed on the throne a prince who was their tool. The introduction of Buddhism is ascribed to this epoch[492]. If Kanishka was then reigning the statement that he conquered Kashgar and Khotan is probably correct. It is supported by Hsüan Chuang's story of the hostages and by his assertion that Kanishka's rule extended to the east of the Ts'ung-ling mountains: also by the discovery of Kanishka's coins in the Khotan district. Little is heard of Kashgar until Fa-Hsien visited it in 400[493]. He speaks of the quinquennial religious conferences held by the king, at one of which he was present, of relics of the Buddha and of a monastery containing a thousand monks all students of the Hinayana. About 460 the king sent as a present to the Chinese Court an incombustible robe once worn by the Buddha. Shortly afterwards Kashgar was incorporated in the dominions of the Hephthalites, and when these succumbed to the western Turks about 465, it merely changed masters. Hsüan Chuang has left an interesting account of Kashgar as he found it on his return journey[494]. The inhabitants were sincere Buddhists and there were more than a thousand monks of the Sarvâstivâdin school. But their knowledge was not in proportion to their zeal for they read the scriptures diligently without understanding them. They used an Indian alphabet into which they had introduced alterations.