At this moment, Dong Che was in a state where he could neither stay silent nor lie.
Once he forcibly chose to remain silent or lie, his heart would explode. Considering that he might not be human, even if the biological weakness of the heart region were damaged, he might not die; some demon hunters seem to have a similar kind of undying nature, so it's hard to judge whether the real Dong Che belongs to that type. However, whether he lives or dies next, as long as there are signs of his heart bursting, I would be able to judge whether he is the real Dong Che.
Originally, I probably should have asked him to lead the way to Ancient Moon Village first, and then settle the suspicion issue with him, but I thought it was even more important to confirm this matter first.
Dong Che seemed to realize his predicament and might even sense the murderous intent I harbored without acting. He did not resist Mazao's heart-grasp and declared with absolute certainty, "I am Dong Che, a human being.