He wrote about immortality, but not for the emperorSourced
A poet wrote that immortality could be learned.
He reportedly avoided the topic with the emperor.
Tang-era Daoist poet Wu Yun wrote a treatise titled Immortality Can Be Learned. Two traditional histories say he was unwilling to discuss cultivating immortality with Emperor Xuanzong. The surviving biographies contain inaccuracies, so this remains a reported anecdote.
A treatise was one thing;
a royal conversation another.
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Wu Yun (Tang dynasty) · Wikimedia contributors
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Reviewed: 2026-10-01