In the spring of 1060, Giáp Đồng natives under the frontier prefectural governor Thân Thiệu Thái (996–1066)—an Tày officer in-law to the Vietnamese court through marriage alliance—raided the Song frontier for cattle and militia recruits. He succeeded in taking the Song military leader Yang Baocai hostage, and in autumn of 1060 Song troops were sent into the frontier to rescue the general but he was not found. The Song court appointed Yu Jing (余靖; 1000–1064) as a new military commissioner of the Guangnan region and charged him with the task of quelling the unrest caused by Thân Thiệu Tháii. Yu Jing also sent an agent to Champa to enlist Cham aid against the Song's enemies in Guangnan.