Walking along this branch for about 3000 feet, it was much further than where the so called geocentric fire vein was. In fact, for Junior Leopard, the place was actually not the hub of this fire vein. It was only a spacious underground magma pool formed from a wide passageway.
It was actually a passageway that the underground magma would pass through. And its surrounding branches would lead to deeper places of the entire underground fire vein. Junior Leopard even inferred that each branch in the passageway could lead to the same earth vein evil qi. Only that those passageways were too narrow, so none of the explorers who could reach here wanted to go further to explore the branches.