```
A month later.
Before setting out, Lu Mingshu went to the Willow Woods residence.
"This is Xiaor's map of his route," An Tongchen placed a map on the table.
Gao Xiang had gone to Nanze from Dongyue, and in his last letter, he mentioned he was preparing for a breakthrough and was going to Nanze in search of a strange stone for sword crafting.
"I traveled to Nanze, and at every place, I would inquire about his whereabouts. The map indicates all the places where he was definitely seen."
Lu Mingshu scrutinized the map: "These places are mostly known for the production of Illusion Dust Stone."
An Tongchen nodded: "Correct, which proves that Xiaor was indeed searching for the Illusion Dust Stone as he had planned."
"And the last known location?"
An Tongchen pointed to the thickest red dot on the map: "Here."
"Martial Uncle, you've checked but found no clues?"
"Yes," An Tongchen said, "He vanished into thin air. I even stayed there for half a year and still found nothing."
