The wolf king of the wolf clan has been passed down from generation to generation, and will pass on the throne to his son when he is about to die. Although the Wolf King holds the highest position in the wolf clan, if the Wolf King does nothing (for example, he can't catch sheep), his wolf will be revoked like other wolves.
For example, Black Wolf, the wolf king before Big Wolf, was released from the wolf's den because he temporarily ran back to take care of the sick Big Wolf when attacking the sheep village. "Big Big Wolf" has also been revoked twice because it can't catch sheep (Pleasant Goat and Big Big Wolf have the best Year of the Rabbit, and Pleasant Goat and Big Big Big Wolf are the sheep village guardians).
Moreover, the general wolf (new wolf) can also instruct the grey wolf to do anything at will (for example, go undercover inside the lamb to be a pet dog).
Related introduction:
Black Wolf, the father of Big Wolf, is also his own flesh and blood. Arguably, he is also qualified to be the Wolf King, but Black Wolf not only failed to be the Wolf King, but was also expelled from the Wolf clan. The reason is that in order to go home and take care of the wolf, he let go of the slow sheep in his hand and was regarded as a deserter by the wolf clan. Black Wolf's expulsion from the wolf's den directly led to his son Grey Wolf and his grandson Grey Grey being at the bottom of the discrimination chain among the wolves.