In Six Chapters of a Floating Life, Ch'ing dynasty writer Shen Fu tells of his lifelong love for his wife Yun-niang. He also carved two seals with the inscriptions "in this life and the next" and "eternally husband and wife," which they kept for use on their regular correspondence.
清代沈三白及芸娘伉儷情深，傳為佳話，三白更刻印兩方，一印為「生生世世」，另一印為「永為夫婦」，夫妻各執一印，作為平常魚雁往返之用。