```
The team set out once again, and this time the number of people had decreased again to only twenty-two, with fifteen left in the Dumping Area to mine and clear out monsters.
Xiao Jie suddenly realized a problem: if they wanted to make sure the route back wouldn't be blocked by monsters and kept clear at all times, it meant that they would have to leave a group behind to clear out monsters every time they advanced. But how many people would it take to explore this mine to the end?
If the mine were a bit shallower, it might be manageable, but what if it was bottomless...
The only other option would be to push through in one go and then push back on the return journey.
However, such an approach would require a high level of strength from the player team, and if strong enemies were encountered on the way forward and the way back was blocked, it would be very easy to get trapped.
