The white crane symbolizes longevity in Chinese culture.
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culture
In Chinese culture the 白鹤 symbolizes longevity and immortality. It is a common companion of Daoist immortals in paintings, where 仙鹤 (xiānhè, "immortal crane") is used interchangeably.
memory
白 (white) + 鹤 (crane) = a literal white crane. The Siberian crane is nearly entirely white, so the name is fully transparent.