In the same year, 713, that Qutayba first led his army across the Jaxartes, a new era of westward expansion opened in China with the accession of Hiuen-Tsong. In 714 the Chinese intervened in the affairs of the Ten Tribes and obtained their immediate submission, while in the following year they restored the deposed king of Farghāna. In 716, on the death of Me-chuʾo, Khan of the Northern Turks, the powerful tribes of the Türgesh asserted their independence, and under their chief Su-Lu established, with Chinese assistance, a new kingdom in the Ili basin. The princes of Transoxania eagerly sought to profit by these developments to free themselves from the Arab yoke. In 718 a joint embassy was sent to China by _T_ughshāda, Ghūrak, Narayāna king of Kumādh, and the king of Chaghāniān. The first three presented petitions for aid against the Arabs, which are given in full in Chavannes’ _Documents_. _T_ughshāda asked that the Türgesh might be ordered to attack the Arabs, Ghūrak related the capture of Samarqand and asked for Chinese troops, Narayāna complained of the seizure of all his treasures by the Arabs and asked that representations might be made to induce them to remit their crushing taxation. It is significant that the king of Chaghāniān, acting for his suzerain, the Jabghu of _T_ukhāristān, did not compromise himself by joining in these requests. But beyond “fair words” the son of Heaven took no action, and no Chinese forces appeared West of the Jaxartes, in spite of the repeated entreaties addressed by the princes to their self-elected suzerain.