There were four sub-ranks within this rank: First, there were four wives (four ladies who were the consorts of the emperor) (Guifei [貴妃], Shufei [淑妃], Defei [德妃], and Xianfei [賢妃]: First grade ranking).
四夫人（貴妃、淑妃、徳妃、賢妃。正一品）。