The use of allusions in autumn in Ling Du is an important historical event in the Spring and Autumn Period and the Warring States Period. According to relevant public information, it is recorded in the historical book Zuo Zhuan that "Weiyang Gong Chilong jumped into the river and died, and his ministers crossed the river, named Qiu Ling". Among them, the Red Dragon of Weiyang Palace was besieged by the State of Qin and bravely jumped into the river and died, but his follower Qiu Ling escaped.