渊源 (yuān yuán): origin; source; relationship

The ties between these two families can be traced back more than a hundred years, when their great-grandfathers founded this factory together.

Her deep interest in classical Chinese poetry has distant roots: it comes from her grandmother reading Tang poems to her every night when she was little.

The cultural exchanges between the two countries have a long history; as early as several hundred years ago, caravans were already traveling back and forth along the Silk Road.

Although these two dialects sound very different, linguists have found through research that they actually share a common origin.

The reason he chose to study traditional Chinese medicine is that several generations of his family have practiced medicine; this heritage gave him a fondness for herbal medicine from childhood.