Jiang Qiao was building a wooden house for Fureya, a house made of towering ancient trees.
The environment of Biland Island was too dangerous, so Jiang Qiao didn't plan to really leave Fureya on Biland Island.
The wooden house was merely a medium. After players went through the teleportation door at the entrance of the wooden house, they would enter the space where Fureya was, which was essentially still located in the real world of the Spirit.
"Don't you plan to build anything else?"
Hai Lan had moved a small stool to watch Jiang Qiao construct the wooden house the entire time. Jiang Qiao used Creation Energy to make this giant ancient tree, spending about a hundred points or so.
The crystallization disease that was eroding the island seemed incompatible with Hai Lan's Divine Energy, hence the crystallization could not affect the wooden house made of ancient trees.