Kanghi intrusted the chief command of his armies to his brother, Yu Tsing Wang, who justified his appointment by bringing the Eleuth forces speedily to an engagement, and by gaming a more or less decisive victory over them at Oulan Poutong. The loss was considerable on both sides, among the imperial officers killed being an uncle of the emperor; but Galdan's forces suffered a great deal more during the retreat than they had done in the action. After this disaster Galdan signed a treaty with the Chinese commander, Yu Tsing Wang. At first he attempted to gain an advantage by excluding his personal enemies, the Khalkas, from it, but the Chinese were not to be entrapped into any such arrangement, and, standing up for their dependents, the provisions of the treaty provided equally for their safety and for the acceptance by Galdan of the supremacy of China. This new arrangement or treaty was concluded in 1690, but Kanghi himself seems to have placed no great faith in the sincerity of Galdan, and to have regarded it merely as a truce. This view was soon found to be correct, for neither side laid aside their arms, and the unusual vigilance of the Chinese gave Galdan additional cause for umbrage. Kanghi showed that he was resolved not to let the terms, to which Galdan had subscribed, become a dead letter. He summoned a great assemblage of the Khalka tribes on the plain of Dolonor--the Seven Springs near Changtu--and he attended it in person, bestowing gifts and titles with a lavish hand. Kanghi was thus able to convince himself that, so far as the Mongol tribes were concerned, he might count on their loyalty and support. He then began to establish an understanding with Tse Wang Rabdan, and thus obtain an ally in the rear of Galdan. This latter circumstance was the direct cause of the second war with Galdan, for Kanghi's embassador was waylaid and murdered in the neighborhood of Hami. The outrage for which, whether he inspired it or not, Galdan was held blameworthy, aroused the strongest resentment and anger of Kanghi.