The aim of this essay is to carry out an analysis and study of the portrait of the Khotan King on the south side of the east wall of the main chamber of Cave 454 at the Mogao Grottoes and showed the light on the identity of the donor is not LI Shengtian, but Congde (Tcūm-ttehī, the reign of 967-977). The conclusion underlying the interrelationship between the identity of the Khotan King and the coexistence of the possibilities identity of the other donors within the cave 454, of the complex interaction between the Khotan King of Congde and other Donors manifest the primordial donor is CAO Yangong, that is the cave 454 was opened by CAO Yangong and later the task was completed by CAO Yanlu.