The peach has been a symbol of longevity for over 2000 years in China. Peach pits were carved into amulets and given to children to protect them and ensure long life.
In the novel, 'Journey to the West,' the Monkey King achieved eternal life by stealing the peaches of immortality from the garden of the Queen Mother of the West just before she hosted a banquet for all the immortals. Offended he had not been invited, the Monkey King cast a spell on the servants, and then ate the exotic food and wine before anyone arrived. Drunk, the Monkey King lost his way back to his home, and wandered into the palace of the Supreme Lord Tao, where the pills of immortality were kept. The Monkey King swallowed all the pills at once, attaining double immortality, since the peaches had already given him immortality earlier.