The Central Continent already had oil lamps. The lamp oil was a mixture of animal fats and certain plant oils, with a thick cotton wick placed inside. They didn't use much fuel, burned for a long time, and provided illumination—much better than bringing a bonfire inside.
Especially since the weather was gradually getting warmer, if one wanted to do some delicate work at night, they couldn't just huddle around a bonfire flickering in the wind, could they?
The Beast Skin Bag was made from the Beast Skins they had brought. After sewing them together, they had a gold elemental beastman help build a frame to support it, and then had a beastman with a Stone Ability conjure a smooth stone bed, stone table and chairs, and a stone cabinet.
Inside the Beast Skin Bag, Ji Liang first set up a defensive barrier and lit the oil lamp.
Si Shuo placed a glass cover over it, so the black smoke and smell from the oil lamp would only rise upward.
