The artist Zhang Lu painted me in the Ming dynasty riding an ox westward — toward the pass where, the story says, I stopped to write the Tao Te Ching before disappearing from history. The ox is calm. I am old. The road ends at the border of the known world.
I am said to have lived one hundred and sixty years, or two hundred and sixty years. I am said to...

— Laozi, Tao Te Ching, Chapter I (c. 6th–4th century BC); Sima Qian, Records of the Grand Historian, 'Biography of Laozi' (c. 90 BC); Zhang Lu, 'Laozi Riding an Ox' (Ming dynasty, c. 1500 AD).
Ancient China