Hi. Building a Simple Metal Furnace (Forge) is our latest video. In this video we have a breakthrough. We are working on a project to advance the metal of the primitive. We found coal in the stream. The temperature of the coal is very large and can be used by the primitive for metallurgy. We have built a special furnace and fan system to burn coal. We will continue to do further research on the metals used by the primitives. It is very difficult to reach the metal but we will try our best. We will continue to make the next video on primitive technology and survival skills. Subscribe to the channel to keep track of the latest videos. Thank you.