The author spent more than ten years, looking for and photographing grottoes, footprints all over China, recording almost all the ancient buddhist grottoes in China with images. The camera shoots not only the buddhist grottoes, which are precious national treasures, but also the people living around the grottoes since ancient times. With the passing of time, the feelings and lives of all living beings seem to merge with the solemn and mysterious Buddha statues.