How many years did Qin Shihuang die? Thank god, help me.

120 years ago, in the thirty-first year of Qin Shihuang, Qin Shihuang began his journey of death. He led a large group of people from Xianyang, the capital, to Yunmeng in the south (now Honghu Lake and Dongting Lake Area) and to Jiuyi Mountain to worship their ancestors. Then, I sailed eastward, landed in Danyang (now Dangtu, Anhui Province), arrived in Qiantang (now Hangzhou, Zhejiang Province), crossed the river and climbed Huiji Mountain, where I sacrificed Dayu to control water and carved stones. After going down the mountain, he went north from Wuzhong (now Wuxian County, Jiangsu Province) to continue his journey of seeking immortality. In order to visit the immortals, Qin Shihuang always went north along the seaside, but he never got anything. Finally, the disappointed Qin Shihuang had to go back. Unexpectedly, he died in Pingyuan Tianjin (now Pingyuan County, Shandong Province). Zhao Gao, Reese and Hu Hai all knew that Qin Shihuang was running out of time, but because Qin Shihuang dared not say the word "death", no one dared to ask him how to arrange the state affairs behind him. As his illness became more and more serious, Qin Shihuang also realized that his life had reached its limit, so he left a will and asked his eldest son Fu Su to go to Xianyang to preside over the funeral and inherit the throne. Letters to Zhao Gao in charge of CRRC. Before the imperial edict was issued, Qin Shihuang died in Dunshatai (now Guangzong, Hebei Province) in the hot summer of July 2 10 BC. Qin Shihuang was only fifty years old when he died. He reigned in the state of Qin for twenty-five years, which was called twelve years of emperor, totaling thirty-seven years.