Introduction to Qin Shihuang’s three inspection tours of Shandong: After Qin Shihuang unified China, he made three large-scale inspections of the coastal areas of Shandong: the first eastward inspection occurred in 219 BC, which was the 28th year of Qin Shihuang; the second eastward inspection The tour to Shandong took place in 218 BC, the spring of the 29th year of Qin Shihuang; the third eastward patrol of Shandong took place in 210 BC, the 37th year of Qin Shihuang. During the three eastward tours, Qin Shihuang had two purposes. One was to promote his merits of unifying the world to the people of the country in order to consolidate the centralization of power; the other was to search for the Three Gods Mountain in order to obtain the elixir of immortality and immortality.