According to legend, in the 28th year of King Qin (2 19 BC), Qin Shihuang crossed Dongting Lake by dragon boat, and the wind and waves suddenly broke out, and the dragon boat was about to capsize. Qin Shihuang hurriedly threw the imperial seal into the lake and prayed to the gods to calm the waves. The decree was lost. Eight years later, someone gave this national seal to Pingshu Road in Huayin.
Ying Zheng ruled the country and was called the first emperor. Li Si's seal script was ordered to "God ordered him to live forever". Sun Shou, a jade worker in Xianyang, polished the stone and carved it into a seal, which is the national seal. In 2 19 BC, the first emperor crossed the mouth of Dongting Lake, when the wind and waves suddenly broke out and the dragon boat was about to capsize. The emperor threw the national seal into the lake to pray for the waves, and the national seal disappeared for the first time. In the autumn of thirty-six years, the emissary crossed Huayin Pingshu Road from Kanto night, and someone gave this country a seal.