1, with bricks and barbed wire. First, build a cuboid base with bricks, the length and height are about 1 m and the width is about 0.5 m, and then enclose it with 2-3 layers of bricks at the top, and the front needs to be empty, and then put the barbed wire on the top.

2. Use iron sheets and iron bars. Find out if there are any unused iron sheets and iron bars at home. According to the size you need, weld the iron sheets into an uncovered cuboid, with the uncovered side facing upwards, and weld the four iron bars at the four corners, which can be used for a long time. If you don't have welding tools at home, you can borrow them from the maintenance station.

3. Use waste iron boxes. First, clean the unused waste tin box thoroughly, then cut off the top side of the tin box, and charcoal can be put inside the tin box, so that a simple barbecue oven is ready.