[6] The Arabs again failed to capture Kabul and Zabulistan in 697–698 CE, and their general Yazid ibn Ziyad was killed in the action.
[7][8] The Chinese emperor signed an investiture decree, which was returned to the Turk rulers:[7] In the seventh year of the Kaiyuan reign [719 CE], [Jibin dispatched] envoys to the [Tang] court, who offered up a book of an astrological text, secret medical recipes, together with foreign medecines and other things.
An imperial edict was issued to bestow on the king [of Jibin] the title Geluodazhi Tele [for "Tegin"].The word "Geluodazhi" in this extract (Chinese: 葛罗达支, pronounced in Early Middle Chinese: kat-la-dat-tcǐe), is thought to be a transliteration of the ethnonym Khalaj.
[10] This title also appears on his coinage in Gupta script, where he is named "hitivira kharalāča", probably meaning "Iltäbär of the Khalaj".
The emperor agreed and dispatched an envoy in order to confer the king's title on him through an imperial edict.