Deer Sanjie is green, which may be due to post-processing. In order to make the shape of Deer Sanjie look better, some merchants will make it green, such as a Yu Pei. Deer Sanjie card was originally cut from animal skulls, and the most precious and legal Deer Sanjie card is the most played Sanjie card in the world today, which is related to the three-striped road, so it is called Sanjie.