Compared to the frenzy at Military Intelligence Ninth Bureau, Feng Xue seemed utterly relaxed. He found that although being possessed by the Ambulance Demon left little room for autonomy, it did not fully suppress the will of the body's original owner.
In other words, the two could communicate mentally.
This meant that they could form a "Contract."
For instance, "I'll teach these jerks a lesson for you now, and you help me later by intensely responding online to posts about 'Libra'. If you find posts asking about channels to contact Libra, reply only once suggesting to call a 'specific number' at a 'specific time' and afterward forget my existence, treating it as your own venting action." This type of agreement, which involves minimal use of extraordinary powers, still holds substantial binding force given the current strength of the Libra urban legend, even if it's just a verbal contract.