Lu Zheng naturally couldn't constantly keep track of that Ghost Head Infant, but he could occasionally glance at Chu Jin, the Town-guard Scribe of Yizhou Prefecture.
Chu Jin, being the Governor of the Yizhou Anomaly Suppression Bureau, might get involved if the Ghost Head Infant entered the mortal world.
If Lu Zheng happened to see it, he could quietly follow and see the outcome of the Ghost Head Infant to decide whether he needed to intervene.
What?
If he didn't see it?
Then forget it. After all, the Ghost Head Infant doesn't know that the Cloud Palace Treasure Mirror is in Lu Zheng's possession. With the enemy in the open and him hidden, Lu Zheng wasn't in a hurry. Perhaps when his cultivation increased, he might go to the Netherworld to stir up trouble.
Additionally...
Besides Lu Zheng, Shen Ying was also the Incense and Candle God of Great Jing and technically an external member of the City God Temple.
