Pei Xingjian

He was also responsible for escorting the Sasanian Persian king-in-exile Narsieh to Persia which was occupied by Arab conquerors.

After serving in Anxi for several years, he returned to the imperial court where he collaborated with Li Jingxuan and Ma Zai.

At this point of time, Pei asked for the mission of escorting the Persian throne successor Narsieh to his homeland.

Tang Emperor Gaozong not only granted his wish but also gave him the mission of pacifying the turbulences in Central Asia.

Minor Turkic chieftains in the region then pledged their loyalty to the Chinese dynasty due to the defeat of Ashina.

Upon returning to China, Pei was appointed the minister of rituals and Great general of the right flank guards.

[5] Ashina's death, according to New Book of Tang, was a ruse against Xingjian by his very own clansman Pei Yan who was jealous about his victories in the West.

The imperial court rewarded him the posthumous name Xian (獻) which means "Dedication", as well as the supreme military honorary title Taiwei (太尉).

Tang dynasty map of its Western territories, showing Tokharistan (吐火罗) in the area of Bactria , at the extreme west of Chinese-controlled territories.