Li deyu, chancellor of the tang dynasty. Zhao county, hebei province, has twice been the phase. Tang xuan zhongda middle two years (AD 848) was demoted to be a cliff state division, the next year the first month arrived. He died at the age of 63. He was 63 years old. He died and was sent to the state of wei. Once wrote the poem "dunya state city" : only the high tower wangjing, the bird flying is half a year. Qingshan like to stay, hundreds of thousands of people around the county, according to legend, li deyu has descended from the qiongshan area of haikou. A total of 49 prime ministers from the sui dynasty to the yuan dynasty were demoted to hainan, where li deyu was the representative. His poems "a journey to a thousand miles, thousands of knowledge not still, cliff state in the place, the birth of the door of the door", became the representative of the demotion officials. Li Deyu lived in hainan island during the live in exile, at the time of the tang dynasty ancient cliff state state, namely during this haikou QiongShan, adversity, still does not forget writing legislation, said prize jealous evil, spread the central plains culture, made positive contributions to development of hainan island culture, haikou five ancestral will be listed as one of the "five male" to commemorate.