Lu Feng spent a full seven days leaving the mine to make his breakthrough. Before leaving, he had a word with the veteran miner leading the group, asking him to hand in one piece of Immortal Crystal ore on his behalf every day.
To this end, Lu Feng had given him thirty pieces of Immortal Crystal ore, fearing that the time required for his breakthrough might be very long.
At this moment, seeing Lu Feng return, the old miner immediately hurried over.
Chapter 249