The Dangerous Mountain Area
It's not that there were no locust trees; it's just that there were no old locust trees. Since the formula provided by the system specifically emphasized an "old" locust tree, it had to be at least ten years old. But when she looked around, there was not a single tree that appeared to be over three years old.
Su Yijia contemplated and finally decided that she would head towards that old tree. From the way 666 had spoken last time, it was clear that she would be lucky in the mountains. She proved this by successfully hunting a wild chicken. Therefore, she believed she would be able to extract the tree-heart worm from this tree safely.