C620 Don't blame me for being cruel and merciless

Wan Chong took Chen Lu away, while Zhang Xin stayed at the scene, she did not leave. He observed the scene carefully, and suddenly found a footprint in the corner, because it was frozen solid, the footprint was preserved very well, but its location was very remote, and this was also the reason why no one had discovered it.

Zhang Xin walked in front of the footprints, then followed the footprints