Chinese transcriptions of the Han or the Tang also infer an original form Küchï, but the form Guzan, representing [Küsan], is attested in seventh century Old Tibetan (in the Old Tibetan Annals, s.v.
The Chinese form of the name Kucha, 龜玆, has often been described as Qiuzi (Wade-Giles: Ch'iu-tzu), but this is incorrect.