公元384年，姚苌自称大将军、大单于、万年秦王，年号白雀，这标志着后秦政权的建立。
In A.D.384 , Yao Chang named himself as Big General , Big Chan Yu , Thousand Years Qin King , and called the year & Bai Que . It was the symbol of the foundation of Hou Qin regime .
大单于