秦始皇吞并六国后,曾四次巡视海疆,至少三次来到了山东半岛。虽说秦始皇受燕齐一带方士的影响,希望能在东部沿海一带寻求到仙人仙药,以求长生不老,但他巡视海疆的主要目的是巩固和开发沿海的疆土。秦始皇初巡海疆,开发琅邪;再巡海疆,诵功嘉德;三巡海疆,炫耀功绩;四巡海疆,耀武大海,包括两次遣徐福东渡,都是在炫耀秦朝的威武之师,宣示他开拓海疆的威力和决心,同时也开启了大规模船队远航大洋、探索海洋奥秘、开拓海洋文化的国家行动。 After Qin Shihuang annexed the six countries, he visited the coast four times and came to the Shandong Peninsula at least three times. Although Qin Shihuang was influenced by the alchemists of the Qi and Qiyang areas, he hoped to seek immortality and immortality in the eastern coastal areas for immortality. However, the main purpose of his visit to the Xinjiang Uygur Autonomous Region was to consolidate and develop coastal areas. Qin Shi Huang tour the sea front, the development of Langya; re-tour of Xinjiang, recite the Guardian; three cruise the coast, show off merit; four cruises, Yao Wu sea, including the removal of Xu Fu Dongduan, are to show off the Qin Dynasty’s mighty division , Declaring that he has pioneered the power and determination of the sea front and opened up a national operation of a large-scale fleet voyage across the oceans to explore the mysteries of the oceans and exploit the marine culture.