After obtaining these two items, climb up the wooden planks nearby and head right.
Jump down from ahead to return to where we exited the elevator earlier.
Take the elevator back upstairs. Hand over the Hunyuan Stone to the Ghost Slayer to complete the "Isolation Wedge" quest.
After completing the task, head right to unlock the door ahead.
Once the door is open, go straight to find two items.
After obtaining it, go up the stairs on the right. Look up as you ascend to spot a resource bag.
After this bag drops, we need to return to the Ghost Slayer's location to retrieve it. After obtaining it, go back upstairs.
There is a resource chest outside to the right of the stairwell.
After looting this chest, head back in the other direction. Defeat the enemies in the corridor and proceed outside.
Keep moving forward and use the Locking Sickle to reach the rooftop.
After finishing the conversation with Mu Xiaokui on the rooftop, obtain the weapon soul-forging material "Organization Supreme Token."

