1. If you have a barbecue at home, you can put a large piece of charcoal on the gas stove and clip it to the bottom of the charcoal basin, and put new charcoal on the burnt charcoal.
2. If you barbecue in the wild, you can use alcohol, kindling carbon, etc. Or you can base the charcoal into a triangle and put some branches and leaves that are easy to ignite at the bottom.