Tubes in the Foot Cavity

The moving car tumbled but Gu Jun's hands were firm as he picked up the 5 cm times 5 cm black bone flap. His mind was in an unusual state, it was a state he had not encountered before. He could feel the Carlot instruments coming alive. Perhaps no one on Earth was more familiar with these instruments than he was. They were magical instruments, he already knew about that; but he did not know how to utilize them. If the knowledge of utilizing these tools was a room, Gu Jun had been locked from entry.