Just as every god in Heaven has their own duties, the duty of Shen Tu and Yu Lei was to guard Buzhou Mountain, not allowing any anomaly to occur. When the Bengyu in Xuanji's hand emitted a ringing sound, they immediately realized it was that War God General who had come to cause trouble again.
This was a very troublesome person, one who was not within their power to restrain. Therefore, when they saw Xuanji charging over, Shen Tu and Yu Lei still held a bit of hope that she wouldn't take rash action. Shen Tu even cleared his throat, intending to persuade her with reason. Who knew that Xuanji would just take a turn around them and head straight for the large gate to the Netherworld that had split open in the middle of Buzhou Mountain.
To intrude into the Netherworld was an even greater offense, so the two of them promptly cried out harshly, "General! You must not enter the realm of the dead without permission!"