Xu Fu (b. 255 BC) was a Chinese alchemist and explorer, who served as a court sorcerer in Qin Dynasty China. Later, he was sent by Qin Shi Huang to the eastern seas twice to look for the elixir of immortality that legend said was hidden on a legendary island on which immortals lived. It was believed that the fleet included 60 ships, containing thousands on crew members and virgin boys and girls.
Xu sailed for several years without finding the mountain. In 210 BC, when Qin Shi Huang questioned him, Xu Fu claimed there was a giant sea creature blocking the path, and asked for archers to kill the creature. Qin Shi Huang agreed, and sent archers to kill the giant fish. Xu then set sail again, but he never returned from this trip.
"The Great World History Book"