Lu Zheng naturally could not keep track of the Ghost Head Infant's whereabouts at all times, but he could check in on Chu Jin, the Pacification Commissioner of Yizhou Prefecture, every now and then.
Chu Jin was the Pacification Commissioner of Yizhou's Demon Suppression Division. If the Ghost Head Infant entered the Yang World, there was a good chance he would be drafted by the Demon Suppression Division of Lingbei Province.
If Lu Zheng happened to see him, he could secretly follow along, see how the Ghost Head Infant met its end, and determine whether he needed to intervene.
What if he did not see him? Then so be it. The Ghost Head Infant did not know that the Cloud Palace Treasure Mirror was in Lu Zheng's hands. The enemy was in the light while he was in the dark. Lu Zheng was in no hurry. Once his cultivation grew stronger, perhaps he could take the initiative and go to the Netherworld to trouble him.
Besides...
Aside from Lu Zheng, Shen Ying was also an Incense God of Great Jing. Strictly speaking, she was an unofficial member under the City God Temple as well.
Coupled with the Old Peach Tree's own keen senses, she could receive information from the City God Temple network at any time, even detect disturbances near the boundary between the Netherworld and the Yang World.
If the battle between the two sides grew large enough, she would likely sense it faintly.
Thus, neither of them paid it much mind. After seeing off Du Huanzhen and You Che, they flew all the way back to Peach Blossom Glade.
Upon returning, they found Tu Yuya gathered around a table with three Peach Blossom Heavenly Maidens again.
"You're back? You took quite a while!"
Tu Yuya glanced at