Who is the Taoist immortal said to have lived 800 years?

The Taoist immortal said to have lived 800 years was Peng Zu.

Peng Zu, or “Peng Ancestor,” is a legendary Chinese figure celebrated for extraordinary longevity. Traditional accounts connect him with the Shang dynasty and describe him as a founder of the state of Dapeng and a marquis under Shang rulers. His legendary lifespan varies by source: some traditions give 400 or 450 years, while others describe him as living 800 years or more.

Peng Zu became an important model for Taoist ideas about nourishing life, longevity practices, and the pursuit of immortality. Stories portray him as knowledgeable about diet, breathing, sexual cultivation, and other methods intended to preserve vital energy. Taoist writers treated his longevity as evidence of disciplined self-cultivation rather than ordinary human aging.

A common mix-up is assuming that Peng Zu is one of the Eight Immortals. He is instead an earlier legendary longevity figure and Taoist saint. The number 800 should be understood as a traditional mythic claim, not a historical age.