 Complete the following phrase:  Southern Han was founded by the brothers Liu Yin and Liu Yan. Liu Yins father, Liu Qian, was the regional inspector of Fengzhou. When he died, Liu Yin succeeded his post, and was made jiedushi of Qinghai in 905. When the Tang dynasty collapsed in 907, the Liu brothers took in refugees from the north and used them to establish an independent realm. Liu Yin died in 911 and his brother succeeded him. Liu Yan proclaimed the Great Yue in 917, but then changed the name to Han a year later. Southern Han invaded An in 930 and removed the Khúc clan from power. The Southern Han general Liang Kezhen raided Champas capital, Indrapura, but the Southern Han themselves were defeated by Dương Đình Nghệ a year later. In 937, Kiều Công Tiễn killed Dương Đình Nghệ and called Southern Han into a war against rebels to the south, however Đình Nghệs son-in-law Ngô Quyền murdered Công Tiễn and defeated the Southern Han fleet at the 