The Bagua Furnace, the Heavenly device which Taoshang Laojun uses to make her elixirs.

Aside from making most of the elixirs in Heaven, it can also make heavenly artifacts such as the the Golden headband on Wukong's head.

The Heavenly Elixirs are invaluable medicines that have to go through a very complicated process to make, where even the smallest and most delicate mistake can have a huge impact on the resultant product.

The task of making elixirs is handled by two of her disciples. They are Jinlu Tongzi (Golden Furnace Boy).

And Yinlu Tongzi (Silver Furnace Boy).

I'm so bored of doing the same old stuff everyday, makes me all drowsy...

Oh shaddap. I'm only sleeping because I've already finished my work.

Really?

Here.