Traveling across the Great Qin Dynasty, he became a crew member of a fleet that went out to sea to seek longevity medicine for the first emperor... After eight years in the ocean, he finally returned to his homeland and became the first returnee from the Great Qin Dynasty. Ying Zheng: Are there immortal mountains? Are there immortals?Is there any elixir? Zhao Si: No...Emperor Shi: Returning without success, this is a death penalty...Zhao Si: I have something to offer! After all, Zhao Si spread out a piece of rag, took out a few bags of crumpled seeds. Your Majesty, this is a map of the world. The Qin Dynasty has not yet unified the world. This is sweet potatoes, with a yield of one thousand catties per mu! This is corn, with a yield of three hundred catties per mu! This is pepper, which is very delicious! Several years later, Zu Long and Zhao Si, drinking wine with hot pot, and hanging a world map beside them, have become the land of Qin...