The olive branch is the branch of the olive tree, and the olive branch symbolizes peace. It was used in biblical stories as a symbol of the earths recovery, and later in Western countries it was used as a symbol of peace. "The Bible Genesis" records: "This happened on February 17." On this day, all the sources of the huge abyss broke through, the skylight opened wide, and heavy rain poured on the earth for 40 days and 40 nights. "Noah and his wife took the ark and drifted in the flood for 40 days before they stranded on a high mountain. In order to find out whether the flood had receded, Noah first sent out a crow, and then twice released a dove. When the dove he sent out for the second time brought back an olive branch, it meant that the flood had receded.